Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. Using the 2007 distance, the star is roughly 22,841,605.48 Astronomical Units from the Earth/Sun give or take a few. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. The two components – Rho Ophiuchi D and E – orbit each other with a period of 675.5 ± 32.5 years. With an effective surface temperature of 6,873.50 K, it is about 164 times more luminous than the Sun. Newborn stars peek out from beneath their natal blanket of dust in this dynamic image of the Rho Ophiuchi dark cloud from NASA's Spitzer Space Telescope. Unlike the main pair, neither of the two fainter components is visible to the naked eye. It is a member of the Scorpius-Centaurus Association star cluster. Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. Rho Ophiuchi is embedded in the Rho Ophiuchi cloud complex, a large nebula of dust and gas that makes the star system appear 1.45 magnitudes dimmer than it really is. Sabik, Eta Ophiuchi (η Oph), is a binary star system composed of two white subgiant stars located in the constellation Ophiuchus.With a combined apparent magnitude of 2.43, it is the second brightest point of light in the constellation, after Rasalhague.Sabik lies at … Ophiuchus is home to several bright globular clusters catalogued by Charles Messier: Messier 9, Messier 10, Messier 12, Messier 14, Messier 19, Messier 62, and Messier 107. satellite operation launched in 1989 for four years. If the R.A. is positive then its eastwards. Still need more data to make this pop a bit more. Cookies / About Us / Contact Us / Twitter / Facebook, Rho Oph, HD 147933, EPIC 204155172, HIP 80473, HR 6112, TYC 6794-549-1, 12 G. Ophiuchi, 5 Ophiuchi A, 5 Oph A, CD-23 12861A, Rho Oph. The blue reflection nebula IC 4603, which surrounds the 8th magnitude blue giant or subgiant star HD 147889 (SAO 184376), lies just south of Rho Ophiuchi. It is purely that the distance was recalculated. The star Rho Ophiuchi, which gives its name to the region, is marked with the Greek letter rho (ρ). The Rho Ophiuchi star system consists of at least five components. The rho Ophiuchi nebula is a nebular cloud located 427 light years from Earth, visible within the Ophiuchus constellation. Based on the star's spectral type of B2V , Rho Ophiuchi's colour and type is blue main sequence star. Look for its ribbed structure. If you need the diameter of the star, you just need to multiple the radius by 2. For Rho Ophiuchi, the location is 16h 25m 35.12 and -23° 26` 49.6 . It is opposite Orion. Ophiuchus is the 11th largest constellation in the sky. Globular clusters such as these typically harbour some of the oldest stars known, some as old as 13 billion years, born soon after the Universe formed. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. The star's Galacto-Centric Distance is 7,296.00 Parsecs or 23,796.88 Light Years. However in the last minute the weather forecast looked bad in the south, so I decided to head east where it looked to stay clear. Rho Ophiuchi (Rho Oph) is the Bayer Classification for the star. Rho Ophiuchi B (HD 147934) is a blue main sequence star of the spectral type B2 V. It shines at magnitude 5.743. NASA Technical Reports Server (NTRS) Stine, Peter C. 1992-01-01. Using the most recent figures given by the 2007 Hipparcos data, the star is 361.20 light years away from us. It is composed of emission, reflection and dark nebulae. Rho Ophiuchi is a Binary or Multiple star system. The time it will take to travel to this star is dependent on how fast you are going. Image: NASA/JPL-Caltech/WISE Team. The Antares – Rho Ophiuchi Region in Scorpius is one of the most beautiful and colorful areas of the entire night sky. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. Ophiuchus constellation, image: Roberto Mura. Rho Ophiuchi is a double star, with yellow components of magnitudes 5.1 and 5.7 separated by 3". The items in red are values that I've calculated so they could well be wrong. When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. 2.75), Kappa Ophiuchi (mag. The Rho Ophiuchi cloud (pronounced ‘oh-fee-yoo-ki’ and named after a bright star in the region) is found rising above the plane of the Milky Way in the night sky, bordering the constellations Ophiuchus and Scorpius. The star system, located only 400 light years away, is distinguished by its colorful surroundings , which include a red emission nebula and numerous light and dark brown dust lanes. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. This explosion of colors is visible in the direction of the constellation Scorpio, between Antares and Rho Ophiuchi, and is due to the nebulosity surrounding the two stars. Called "Rho Oph" by astronomers, it's one of the closest star-forming regions to our own solar system. The Rho Ophiuchi cloud complex is a dark nebula of gas and dust that is located 1° south of the star ρ Ophiuchi of the constellation Ophiuchus . It is a binary star system and the closest stellar nursery to Earth. Rho Ophiuchi is not part of the constellation outline but is within the borders of the constellation. The same is true for most of the multi-hued gas prevalent throughout the entire image, including the bluish bow-shaped feature near the bottom right. Rho Ophiuchi A (HD 147933) has been classified as both a subgiant and a main sequence star. Ophiuchus also contains Kepler’s Supernova (SN 1604), a supernova remnant associated with a Type Ia supernova first seen in 1604. Rho Ophiuchi is the bright star system located in the top blue reflection nebula, while Antares is the very bright yellow star in the yellow to orange nebulosity. The star has an apparent magnitude of 5.067. Representing the Greek mythical healer Asclepius, Ophiuchus is one of the 48 Greek constellations, first catalogued by the Greek astronomer Claudius Ptolemy in his Almagest in the 2nd century CE. Telescope: GSO 8” RC CF Mount: Losmandy G11 with Onstep Camera: ST 8300M Filters: Baader HGB Guiding: PHD2 Processing: PixInsight Capture software: CCDCiel Exposures: "B: 15x300"" bin 1x1, G: 15x300"" bin 1x1, Ha: 30x1200"" bin 1x1" Location: Parsippany,NJ It was around 1:30 am in mid June. Ophiuchus lies between Aquila, Serpens, Scorpius, Sagittarius, and Hercules, northwest of the center of the Milky Way. These baby stars are just now forming; many of them are still enveloped in their own tiny compact nebulae. has done some calculations as to how long it will take going at differing speeds. منطقة العقرب بمعالجه (Processing) أكثر حرافيه. The Rho Ophiuchi nebular complex is a gigantic and beautiful cloud of dust and colored cosmic gas, located 460 light years from Earth in the constellation Ophiuchus. Find a location with very low to no light pollution. It is smaller than Rho Ophiuchi A, but still 5.98 times larger than the Sun. I used a Vixen Polarie star tracker, 100mm lens … The location of the main sequence star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. Rho Ophiuchi (AB) was discovered to be a double by German-born British astronomer William Herschel in the 18th century. Rho Ophiuchi cloud complex, image: Wikisky. 2.07), Sabik (Eta Oph, mag. Based on the spectral … The source of the information if it has a Hip I.D. Heaven's Mirror. Without the interstellar extinction, Rho Ophiuchi would shine at magnitude 3.18. However, with a combined apparent magnitude of 4.63, the star system cannot be seen from heavily light-polluted areas. Ophiuchus is depicted as a man grasping a serpent; the interposition of his body divides the snake constellation Serpens into two parts, Serpens Caput and Serpens Cauda. The Rho Ophiuchi cloud complex is another dark nebula in Ophiuchus, located a degree to the south of the star Rho Ophiuchi. Rho Ophiuchi ERIC JOHNSON JOHNSON. Rasalhague, the brightest star in the constellation, has an apparent magnitude of 2.08. 3.20), Yed Posterior (Epsilon Ophiuchi, mag. IC 4605, a reflection nebula around 22 Scorpii, appears to the southeast of Rho Ophiuchi, closer to Antares in the constellation Scorpius. The star has a radius 3.33 times that of the Sun and shines with 19.309 solar luminosities with an effective temperature of 6,631 K. Rho Ophiuchi DE (HD 147888) is a binary star with a total mass of about 5.8 solar masses. WISE’s longer wavelength detectors can typically see through dark nebulae, but these are exceptionally opaque. It lies west of Rho Ophiuchi, about halfway between the brighter Antares and Acrab in Scorpius. It contains five stars brighter than magnitude 3.00. Rho Ophiuchi is located in the constellation Ophiuchus, the Serpent Bearer. The bright white nebula in the centre of the image is glowing due to heating from nearby stars, resulting in what is called an emission nebula. It lies on the ecliptic and is visible from all inhabited areas for at least a part of the year. Avoided the very bright interior. IC 4604 is a Nebula in the Ophiuchus constellation.IC 4604 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. The nebula is one of the nearest star-forming regions to the Sun. Rho Ophiuchi is a b2v main sequence star that can be located in the constellation of Ophiuchus. IC 4604 (Rho Ophiuchi Nebula) - Nebula. SPECIFICATIONS. The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -11.40000 km/s with an error of about 3.00 km/s . Rho Ophiuchi cloud complex. Here is the RHO Ophiuchi area, but now with 225 minutes. The entire constellation is visible from locations between the latitudes 80° N and -80° S. The 10 brightest stars in Ophiuchus are Rasalhague (Alpha Oph, mag. The total mass of the system is about 23.6 solar masses. 3 months ago 0. IC 4592, the Blue Horsehead Nebula. The main pair in the system, Rho Ophiuchi AB, has a combined apparent magnitude of 4.63 and, while it is visible to the naked eye, it is not among the 20 brightest points of light in Ophiuchus. 2.569), Yed Prior (Delta Oph, mag. The fainter binary, Rho Ophiuchi DE, was discovered to be a binary system by American astronomer Sherburne Wesley Burnham in 1894. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet. With a surface temperature of 7,397.50 K, it is 96.352 times more luminous than the Sun. Reflection nebula IC 4604 surrounds Rho. Rho Ophiuchi Cloud Complex map, image: Roberto Mura (CC BY-SA 3.0). It lies next to the larger reflection nebula IC 4592, named the Blue Horsehead Nebula. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. Radio and infrared emission from Markarian starburst galaxies. At an estimated distance of 131 ± 3 parsecs , [2] [4] this cloud is one of the closest star-forming regions to t. The nebula is approximately 460 light years distant from Earth. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Messier 4, another globular cluster, lies south of Rho Ophiuchi, about a degree and a half west of Antares. Celestial coordinates and finder chart of ρ Ophiuchi ρ Ophiuchi is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. If it helps, Mark, I have imaged Antares and the Rho Ophiuchi region from just under 50.4 deg. The Bayer Classification was created by Johann Bayer in 1603. The brightest parts of the cloud complex include the nebulae IC 4604, IC 4603 and IC 4605. The number of A.U. There's no register feature and no need to give an email address if you don't need to. You can decline to give a name which if that is the case, the comment will be attributed to a random star. These were not created by foreground satellites; they are diffraction spikes (optical artefacts from the space telescope) from the bright star Antares that is just out of the field of view. Rho Ophiuchi C and DE are separated by 17,000 and 19,000 astronomical units – or 2.5 and 2.82 arcminutes – from the AB pair. The blue areas are in fact nebulae that reflect the light produced by Rho Ophiuchi and the stars close to it. VISIBILITY RIGHT NOW ρ Ophiuchi (rho Ophiuchi) is below the horizon from Greenwich, United Kingdom [ change ]. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 7.17. All messages will be reviewed before being displayed. It is slightly brighter than Rho Ophiuchi C, with a visual magnitude of 6.807. And, at the bottom left of the image, there are two lines emerging from the edge. U.G. The first cluster, M80, is on the far right edge of the image towards the top. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. Apparent Magnitude is also known as Visual Magnitude. Corncorde before it was retired was the fastest commercial airline across the Atlantic and only one that could do Mach 2. There are two other items of interest in this image as well. Equipment and processing. Burnham made his observations at Lick Observatory in California. If you want that in miles, it is about 2,318,471,060,929,883.95, based on 1 Ly = 5,878,625,373,183.61 miles. Other notable stars in Ophiuchus include Barnard’s Star, the second nearest star (system) to Earth, after Alpha Centauri, the red dwarf Wolf 1061, which hosts three known planets, the massive O-type star Zeta Ophiuchi, and the recurrent nova RS Ophiuchi. The two stars are separated by 3.1’’ on the sky, which translates to a physical distance of about 344 astronomical units. Location. The Rho Ophiuchi cloud complex is one of the nearest star forming regions to the Sun. Antares to Rho Ophiuchi #Flickr12Days cooledpix.com/2013/07/25/antares-to-rho-ophiuchi/ 2013/06/01 06/08 06/15: Antares to Rho Ophiuchi. XSS J16271-2423, better known as Rho Ophiuchi, lies at a distance of about 400 light years from us. The position of IRAS 16293-2422, a young binary star with a … 5. The figure of 147.62 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012. Below Sigma Scorpii and to the right of Antares is the globular cluster M4. Rho Ophiuchi has an apparent magnitude of 4.57 which is how bright we see the star from Earth. This is my version Rho Ophiuchi, for now. This map shows the location of the Rho Ophiuchi star formation region in the constellation Ophiuchus (The Serpent Bearer). Zeta Ophiuchi is a young, large and hot star located around 370 light-years away. Located approximately 460 light-years away from Earth, the interstellar clouds of gas and dust that make up Rho Ophiuchi contain emission nebulas that are … The constellation does not contain any first-magnitude stars that would make it stand out in this part of the sky, but it is not faint either. It is one of the closest stellar nurseries to the solar system and one of the most photographed objects in the night sky. Rho Ophiuchi (ρ Oph) is a multiple star system located at an approximate distance of 360 light years from Earth in the constellation Ophiuchus. The star is moving -21.74 ± 0.61 milliarcseconds/year towards the north and -5.53 ± 0.90 milliarcseconds/year east if we saw them in the horizon. This is a Binary Star in the Process of Formation About 460 light years away lies the Rho Ophiuchi cloud complex. In the northern hemisphere, it is best visible in summer. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. The southern part lies between Scorpius to the west and Sagittarius to the east. In visible light, these YSOs are completely hidden in the dark nebula that surrounds them, which is sometimes referred to as their baby blanket. Radio and infrared emission were compared for a sample of 58 Markarian starburst galaxies, chosen to cover a wide range of 60-micron luminosity density. All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. The bright red area in the bottom right is light from the star in the centre – Sigma Scorpii – that is reflected off of the dust surrounding it, creating what is called a reflection nebula. Rho Ophiuchi - 1" exposures on a tripod - fun! The nebula is approximately 460 light years distant from Earth. It is classified as a rotationally variable star. Location: Anza, CA The bright pink objects just left of centre are young stellar objects (YSOs). The globular cluster Messier 80 stretches across 10’ of the sky and has a spatial diameter of 95 light years. Based on the spectral type, we can deduce that the surface temperature of the star is in the order of between 10,000 and 25,000K based on the notes from Harvard University. The colored region of Rho Ophiuchi Antares spring and clearly on the right of the image. is the number of times that the star is from the Earth compared to the Sun. The Blue Horsehead Nebula is illuminated by the hot blue stars of the Nu Scorpii system, known by the traditional name Jabbah. The main pair in the system, Rho Ophiuchi AB, has a combined apparent magnitude of 4.63 and, while it is visible to the naked eye, it is not among the 20 brightest points of light in Ophiuchus. N. here in Cornwall. Below Rho Ophiuchi is the blue nebulosity of IC 4603. And just to the right of Antares, you find M4, the Crab Globular Cluster. That dot is an entire galaxy far, far away known as PGC 090239. Rho Ophiuchi itself is a binary star system visible in the light-colored region on the image right. The main pair, Rho Ophiuchi AB, is a visual double composed of two class B2 stars, a subgiant and a giant. Adam Block's Latest View of the Universe: The Heart of the Scorpion widefield near Antares and Rho Ophiuchi released 07/03/2019 It has been known to produce widely incorrect figures. الصحراء البيضاء/مصر. Rho Ophiuchi 90x120secs Sigma 105mm F/1.4 Art Lens Stopped down to F/2, ZWO ASI-2600MC Pro Colour CMOS from Roboscopes@eEYE It surrounds the huge orange star Antares. Because of its size, you will not need to capture this target with a telescope. Sh 2-9 is the red emission nebula associated with Sigma Scorpii, the blue star near the right edge of the image. Hipparcos was a E.S.A. The billing address on the plane ticket was the Omega Rho fraternity house. The Sun's radius is 695,800km, therefore the star's radius is an estimated 5,445,944.44.km. If you used the 1997 Parallax value, you would get an absolute magnitude of -0.84 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.65. More details on objects' alternative names can be found at. The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. The description is based on the spectral class. Based on the spectral type (B2V) of the star, the star's colour is blue . To put this in context, the temperature of our Sun is about 5,778 Kelvin as said by Google. The stars also lie farther away, at distances of about 408 and 440 light years from Earth. Visible from all inhabited locations on both hemispheres for at least a part of the year, the nebula is a popular target for backyard telescopes, as well as for scientific observations. We can also see some of the oldest stars in our Milky Way Galaxy in this image, found in two separate (and much more distant) globular clusters. Rho Ophiuchi forms a triangle with Antares and Alniyat (Sigma Scorpii), a magnitude 2.28 star system flanking the red supergiant. https://www.space.com/37418-rho-ophiuchi-nebula-photos.html 70 Ophiucus is a star system that was located around 15 light-years from Earth in the galaxy's Beta Quadrant, in the space of the Ophiuchus constellation. Rho Ophiuchi (ρ Oph) is a multiple star system located at an approximate distance of 360 light years from Earth in the constellation Ophiuchus. In 2007, Hipparcos data was revised with a new parallax of 9.03000 which put Rho Ophiuchi at a distance of 361.20 light years or 110.74 parsecs. - posted in Beginning Deep Sky Imaging: Hey everyone, Last Saturday I had full intentions to head down to a location with very dark southern skies in order to attempt Rho Ophiuchi. Rho Ophiuchi estimated radius has been calculated as being 7.83 times bigger than the Sun. A faint star will have a high number. They both appear as small densely compacted groups of blue stars. Rho Ophiuchi DE is about 14 times more luminous than the Sun with a surface temperature of 6,676 K. It has a radius 2.81 times that of the Sun. Ophiuchus straddles the equator with the majority of its arealying in the south… New radio observations were from the VLA at 6 and 20 cm in the B and A configurations. The nebula lies a degree south of Rho Ophiuchi and stretches across an area of 4.5 by 6.5 degrees of the sky. IC 4604, also known as the Rho Ophiuchi Nebula, is a reflection nebula illuminated by Rho Ophiuchi itself. Rho Ophiuchi, Antares and the Rho Ophiuchi cloud complex, image: Adam Block/Steward Observatory/University of Arizona (CC BY-SA 4.0). Proper Motion details the movements of these stars and are measured in milliarcseconds. The brightest star in the constellation is normally given the Alpha designation, there are exceptions such as Pollux which is Beta Geminorum. The amazing variety of different colours seen in this image represents different wavelengths of infrared light. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. Rho Ophiuchi C (HD 147932) has the stellar classification B5 V – indicating a blue main sequence star – and an apparent magnitude of 7.290. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. It is also considerably larger than the Sun, with 9.03 solar radii. Rho Ophiuchi 6 hours total imaging, equal number of Red, Green and Blue 5 minute images. The best time of year to see the stars and deep sky objects in Ophiuchus is during the month of July, when the constellation is prominent in the evening sky. In addition to the Rho Ophiuchi nebula, there are several bright deep sky objects appearing in the vicinity of the star. The second, NGC 6144, is found close to the bottom edge near the centre. 45N parallel is kind of high to image Rho Ophiuchi. It has the stellar classification B3/4 V, indicating another blue main sequence star. The Rho Ophiuchi system is surrounded by a large region of nebulosity known as the Rho Ophiuchi cloud complex. It lies at a distance of about 427 light years from Earth. Clear Skies 3.22), Theta Ophiuchi (mag. And the much darker areas scattered throughout the image are pockets of cool dense gas that block out the background light, resulting in absorption (or ‘dark’) nebulae. The location was a beach, with the view South entirely over the sea. Rho Ophiuchi is relatively easy to find because it is located just north of the bright supergiant Antares. Where did you image? La région colorée de Rho Ophiuchi et d'Antares ressort très nettement sur la droite de l'image. 3.332), and 72 Ophiuchi (mag. A name is preferred even if its a random made up one by yourself. Date: Aug. 13, 2020 منطقة العقرب في سماء الليل مليئة بالسدم الملونة. A rich collection of colourful astronomical objects is revealed in this picturesque image of the Rho Ophiuchi cloud complex from NASA’s Wide-field Infrared Explorer, or WISE. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days). Also known as Serpentarius, Ophiuchus is typically depicted as a man holding a large snake, represented by the constellation Serpens. Other interesting deep sky objects in the constellation include the open cluster IC 4665, the ultraluminous infrared galaxy NGC 6240, the planetary nebula known as Minkowski’s Butterfly (M2-9) or the Twin Jet Nebula, and the Dark Horse Nebula, a large dark nebula near the border with Sagittarius. However, the real separation between the stars is greater and they have an orbital period of 2,398 ± 326 years. It’s a molecular cloud—an active … In the case of a star, its the galactic centre. It should not be taken as though the star is moving closer or further away from us. At the 3 o’clock position, relative to the bright central region, and about two-thirds of the way from the centre to the edge, there is a small faint red dot. Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.27000 which gave the calculated distance to Rho Ophiuchi as 394.39 light years away from Earth or 120.92 parsecs. Acamar Achernar Acrux Adhafera Adhara Albireo Alchiba Alcor Alcyone Aldebaran Alderamin Algenib Algieba Algol Algorab Alhena Alioth Alkaid Alkes Almach Alnair Alnilam Alnitak Alpha Centauri Alphard Alphecca Alpheratz Altair Aludra Ankaa Anser Antares Arcturus Ascella Asterope Atlas Atria Avior Baten Kaitos Bellatrix Betelgeuse Bharani Canopus Capella Caph Castor Celaeno Deneb Denebola Diphda Dubhe Electra Elnath Eltanin Enif Epsilon Lyrae Fomalhaut Gacrux Gamma Cassiopeiae Gienah Ginan Hadar Hamal Hassaleh Imai Izar Kaus Australis Kaus Borealis Kaus Media Kepler-22 Kochab Kraz Mahasim Maia Marfik Markab Megrez Meissa Menkalinan Menkar Menkent Merak Merope Mesarthim Methuselah Star Miaplacidus Mimosa Minkar Mintaka Mira Mirach Mirfak Mirzam Mizar Mu Cephei Naos Nunki Peacock Phecda Pherkad Pleione Polaris Pollux Procyon Proxima Centauri Rasalhague Regor Regulus Rho Ophiuchi Rigel Rigil Kentaurus Ruchbah Sabik Sadalmelik Sadalsuud Sadr Saiph Sargas Scheat Schedar Segin Seginus Shaula Sheratan Sirius Spica Stephenson 2-18 Suhail Taygeta Thuban Toliman Unukalhai UY Scuti Vega Vindemiatrix VV Cephei VX Sagittarii Wasat Wezen WOH G64 Zeta Reticuli Zosma Zubenelgenubi Zubeneschamali, Rho Ophiuchi, ρ Oph, 5 Ophiuchi, HIP 80473, CD-23 12861, 2MASS J16253509-2326486, UBV 13904, CCDM J16255-2327AB, ADS 10049 AB, IDS 16196-2313 AB, WDS J16256-2327AB, Rho Ophiuchi A, ρ Oph A, HD 147933, HR 6112, HIP 80473A, CD−23° 12861A, SAO 184382, GC 22079, GCRV 9445, PPM 265516, JP11 2740, UBV M 21412, TYC 6794-549-1, CCDM J16255-2327A, Gaia DR2 6050943406293584768, CPD-23 6369A, ALS 15028, ADS 10049 A, IDS 16196-2313 A, WDS J16256-2327A, Rho Ophiuchi B, ρ Oph B, HD 147934, HR 6113, HIP 80473B, CD−23° 12861B, SAO 184381, GC 22078, GCRV 9444, IRAS 16225-2319, TYC 6794-549-2, Gaia DR2 6050943410590451328, UBV 13903, ADS 10049 B, ALS 15029, CD-23 12861B, CCDM J16255-2327B, WDS J16256-2327B, Rho Ophiuchi C, ρ Oph C, HD 147932, HIP 80474, CD−23° 12862, SAO 184383, CPD-23 6370, GC 22080, GCRV 9446, GSC 06794-00548, PPM 265515, 2MASS J16253507-2324186, TYC 6794-548-1, Gaia DR1 6050945742755793408, Gaia DR2 6050945747052676352, UBV M 21411, ADS 10049 C, CCDM J16255-2327C, WDS J16256-2327C, Rho Ophiuchi D, ρ Oph D, HD 147888, HIP 80461, CD−23° 12860, SAO 184377, CPD-23 6368, PPM 265512, GC 22070, GCRV 9442, GSC 06794-00550, 2MASS J16252427-2327367, UBV 13900, TYC 6794-550-1, Gaia DR2 6050944063425483520, ADS 10049 DE, ADS 10045, WDS J16256-2327DE. An Astronomical Unit is the distance between Earth and the Sun. The reflection nebula IC 4601 appears north and a little west of Rho Ophiuchi. 3.73). 2.43), Zeta Ophiuchi (mag. 3.26), Nu Ophiuchi (mag. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever. 2.75), Cebalrai (Beta Oph, mag. With an apparent magnitude of 7.87, the cluster can be seen in small telescopes. It’s one of the nearest star-forming regions to Earth, allowing us to resolve much more detail than in more distant similar regions, like the Orion nebula. Also there is light from Antares poking into the top right corner, grrr bright stars!
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