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Star in the constellation Ophiuchus
30 Ophiuchi is a single star in the equatorial constellation of Ophiuchus, and figures 0.99° east (specifically E½S) of the heart of cluster Messier 10
30_Ophiuchi
Bode, now usually disused "Bangladesh". NameExoWorlds. Retrieved 2019-12-30. Designated as g Tauri Poniatovii by Johann Bode, now usually disused Designated
List_of_stars_in_Ophiuchus
Star in the constellation Ophiuchus
70 Ophiuchi (p Ophiuchi) is a binary star system located 16.7 light-years away from the Earth. It is in the constellation Ophiuchus. At magnitude 4 it
70_Ophiuchi
Constellation straddling the celestial equator
rotation. Eta Ophiuchi is a binary system. Other bright stars in the constellation include β Ophiuchi, Cebalrai ("dog of the shepherd") and λ Ophiuchi, or Marfik
Ophiuchus
Triple star system in the constellation Ophiuchus
36 Ophiuchi (or Guniibuu for component A) is a triple star system 19.5 light-years from Earth in the constellation Ophiuchus. 36 Ophiuchi is the system's
36_Ophiuchi
Star in the constellation Ophiuchus
Alpha Ophiuchi (α Ophiuchi, abbreviated Alpha Oph, α Oph), also named Rasalhague /ˈræsəlheɪɡ/, is a binary star and the brightest star in the constellation
Alpha_Ophiuchi
Globular cluster in the constellation Ophiuchus
to be 14,300 light-years away from Earth. It figures a degree west of 30 Ophiuchi, a center-of-constellation orange star. In terms of the abundance of
Messier_10
Star in the constellation Ophiuchus
51 Ophiuchi is a single star located approximately 410 light years away from the Sun in the equatorial constellation of Ophiuchus, northwest of the center
51_Ophiuchi
O-type main sequence star in the constellation Ophiuchus
Zeta Ophiuchi (ζ Oph, ζ Ophiuchi) is a single star located in the constellation of Ophiuchus. It has an apparent visual magnitude of 2.6, making it the
Zeta_Ophiuchi
Star system in the constellation Ophiuchus
V1054 Ophiuchi, together with the star Gliese 643, is a nearby quintuple star system, located in the constellation Ophiuchus at a distance of 21.2 light-years
V1054_Ophiuchi
Orange giant star in the constellation Ophiuchus
Beta Ophiuchi or β Ophiuchi, also named Cebalrai /ˌsɛbəlˈreɪ.iː/, is a star in the equatorial constellation of Ophiuchus. The apparent visual magnitude
Beta_Ophiuchi
Star in the constellation Ophiuchus
Nu Ophiuchi (ν Oph, ν Ophiuchi) is a star in the equatorial constellation of Ophiuchus. The apparent visual magnitude is +3.3, making it one of the brighter
Nu_Ophiuchi
Star in the constellation Ophiuchus
Epsilon Ophiuchi or ε Ophiuchi, formally named Yed Posterior (/ˌjɛd pɒˈstɪəriər/), is a red giant star in the constellation of Ophiuchus. Located less
Epsilon_Ophiuchi
Emission nebula in constellation Ophiuchus
Nebula or the Zeta Ophiuchi Nebula), is an emission nebula in the constellation Ophiuchus. It is ionized by the star Zeta Ophiuchi, which lies near its
Sh_2-27
Red dwarf star in the constellation Ophiuchus
is a flare star. Barnard's Star has the variable star designation V2500 Ophiuchi. In 2003, Barnard's Star presented the first detectable change in the radial
Barnard's_Star
Star in the constellation Ophiuchus
Theta Ophiuchi, Latinized from θ Ophiuchi, is a multiple star system in the equatorial constellation of Ophiuchus. It lies on the "right foot" of the
Theta_Ophiuchi
Binary star in the constellation Scorpius
at the rim of the Upper Scorpius subgroup, and is illuminating the Rho Ophiuchi cloud complex in its foreground. Classified as spectral type M1.5Iab-Ib
Antares
Star system in the constellation Ophiuchus
λ Ophiuchi, Latinized as Lambda Ophiuchi, is a quadruple star system in the equatorial constellation of Ophiuchus. It has the traditional name Marfik /ˈmɑːrfɪk/
Lambda_Ophiuchi
This is a list of star systems within 30–35 light years of Earth. Lists of stars List of star systems within 25–30 light-years List of star systems within
List of star systems within 30–35 light-years
List_of_star_systems_within_30–35_light-years
Star in the constellation Ophiuchus
44 Ophiuchi is a single star in the constellation Ophiuchus. It has the Bayer designation b Ophiuchi, while 44 Ophiuchi is the Flamsteed designation. It
44_Ophiuchi
Star in the constellation Ophiuchus
μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary, blue-white hued star in the equatorial constellation of Ophiuchus. It is visible to the naked as a
Mu_Ophiuchi
Double star in the constellation Serpens
with Delta Serpentis, Epsilon Serpentis, Delta Ophiuchi, Epsilon Ophiuchi, Zeta Ophiuchi and Gamma Ophiuchi. According to a 1971 NASA catalogue, al-Nasaq
Alpha_Serpentis
American astronomer
Several years earlier, in 1895, while studying the well known binary star 70 Ophiuchi at the University of Chicago (and from a few observations made at the Leander
Thomas_Jefferson_Jackson_See
Giant star in the constellation of Ophiuchus
71 Ophiuchi is a single star in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-hued point of light with an
71_Ophiuchi
Star in the constellation Ophiuchus
ι Ophiuchi, Latinized as Iota Ophiuchi, is a single star in the equatorial constellation of Ophiuchus, positioned near the constellation border with Hercules
Iota_Ophiuchi
Star in the constellation Ophiuchus
Kappa Ophiuchi, Latinized from κ Ophiuchi, is a star in the equatorial constellation Ophiuchus. It is a suspected variable star with an average apparent
Kappa_Ophiuchi
Astronomical object in Ophiuchus
Flying Saucer (2MASS J16281370-2431391) is a protoplanetary disk in the Rho Ophiuchi cloud complex. The 2MASS source J16281370-2431391 was identified as resolved
Flying Saucer (protoplanetary disk)
Flying_Saucer_(protoplanetary_disk)
Emission nebula
assembled by Stewart Sharpless. The nebula appears to surround 63 Ophiuchi, however, 63 Ophiuchi and the star's corresponding ring nebula around it are unrelated
Sh_2-22
Star in the constellation Ophiuchus
Sigma Ophiuchi, Latinized from σ Ophiuchi, is a single, orange-hued star in the equatorial constellation Ophiuchus. Its apparent visual magnitude is 4
Sigma_Ophiuchi
Visual binary star system in the constellation Ophiuchus
Xi Ophiuchi (Latinized from ξ Ophiuchi, abbreviated ξ Oph) is a visual binary star system in the equatorial constellation of Ophiuchus. It has a yellow-white
Xi_Ophiuchi
American politician (1823–1878)
finest – novel, The Ophiuchi Hotline...". Staff "The Ophiuchi Notline Analysis – John Varley" eNotes. Nicholls, James (October 30, 2016) "No father, no
William_M._Tweed
Proposed thirteenth astrological sign
Anonymous of 379, associated "the bright star of Ophiuchus", Ras Alhague (α Ophiuchi), with doctors, healers or physicians (ἰατρῶν), which may have been because
Ophiuchus_(astrology)
Star in the constellation Ophiuchus
66 Ophiuchi is a binary variable star in the equatorial constellation of Ophiuchus. It has the variable star designation V2048 Ophiuchi, while 66 Ophiuchi
66_Ophiuchi
Double star in the constellation Ophiuchus
ο Ophiuchi, Latinized as Omicron Ophiuchi, is a wide double star in the equatorial constellation of Ophiuchus. The co-moving pair are visible to the naked
Omicron_Ophiuchi
Star in the constellation Ophiuchus
47 Ophiuchi (47 Oph) is a binary star in the constellation Ophiuchus. The combined apparent magnitude of the system is 4.54. The system is located about
47_Ophiuchi
www.aavso.org. "Alert Notice 752: Rare Outburst of Recurrent Nova RS Ophiuchi". www.aavso.org. Drake, Jeremy J.; Ness, Jan-Uwe; Page, Kim L.; Luna, G
List of novae in the Milky Way galaxy
List_of_novae_in_the_Milky_Way_galaxy
Globular cluster in the constellation Ophiuchus
M10 and 5.6° east southeast from star Lambda Ophiuchi. It is also located near the 6th magnitude 12 Ophiuchi. The cluster is about 16,400 light-years (5
Messier_12
Gas and dust surrounding a newly formed star
which have ages in the range of ~10 million years (e.g. Beta Pictoris, 51 Ophiuchi) to billions of years (e.g. Tau Ceti). These systems are usually referred
Protoplanetary_disk
stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive
List_of_proper_names_of_stars
Circumbinary planetary-mass object orbiting ROXs 42B
planetary-mass companion to the binary M star ROXs 42B, a likely member of the Rho Ophiuchi cloud complex. The companion was independently discovered in December 2013
ROXs_42Bb
Triple star system in the constellation Eridanus
Determination of Radial Velocities and Their Applications. 30: 57. Bibcode:1967IAUS...30...57E. Heintz, W. D. (1974). "Astrometric study of four visual
40_Eridani
Multiple star in the constellation Ophiuchus
Hierarchy of orbits Upsilon Ophiuchi is a quadruple star system in the equatorial constellation of Ophiuchus. It has a white hue and is faintly visible
Upsilon_Ophiuchi
Astronomical category of stars
very distant future. The term iron star was applied to a star called XX Ophiuchi (XX Oph) or "Merrill's Iron Star" with a complex, highly variable spectrum
Iron_star
Constellations recognized by the International Astronomical Union
Constellations". Popular Astronomy. 30: 469. Bibcode:1922PA.....30..469R. "Constellations". Ian Ridpath. Retrieved 30 January 2023. "The Constellations"
IAU_designated_constellations
Pattern of stars recognized on Earth's night sky
Epsilon Serpentis, Delta, Epsilon, Upsilon, Zeta and Eta Ophiuchi, Xi Serpentis, Nu and Tau Ophiuchi, Eta and Theta Serpentis. The Eagle Tail Corona is a
Asterism_(astronomy)
of the Scorpius–Centaurus association ρ Ophiuchi association ρ Ophiuchi Ophiuchus 430 2 See also: Rho Ophiuchi cloud complex Pleiades Pleiades Taurus 444
List of nearby stellar associations and moving groups
List_of_nearby_stellar_associations_and_moving_groups
Star at the centre of the Solar System
star-forming regions are the Corona Australis Molecular Cloud, the Rho Ophiuchi cloud complex and the Taurus molecular cloud; the latter lies just beyond
Sun
Architecture of a pair of 6:1 Resonant Brown Dwarfs around the Naked-eye star ν Ophiuchi". Research in Astronomy and Astrophysics. arXiv:2606.16777. Sato, Bun'ei;
List of exoplanets and planetary debris around giant stars
List_of_exoplanets_and_planetary_debris_around_giant_stars
Milky Way superbubble
younger peak might have created the pulsar PSR B1706-16 and turned Zeta Ophiuchi into a runaway star. Both originated from UCL and were released by a supernova
Local_Bubble
Zodiac constellation in the southern celestial hemisphere
of Scorpius. M4 is visible near the left of center. Portions of the Rho Ophiuchi cloud complex are illuminated by Antares and the other neighboring stars
Scorpius
Star system in the constellation Boötes
known? Insights from the 2023/4 pericenter passages of Zeta Boötis and Eta Ophiuchi", The Open Journal of Astrophysics, 8: 63, arXiv:2504.17858, Bibcode:2025OJAp
Zeta_Boötis
2022-08-31. "VSX : Detail for NSV 4823". www.aavso.org. Retrieved 2022-08-30. "* Zet01UMa". simbad.u-strasbg.fr. Retrieved 2022-08-29. "* Zet02UMa". simbad
List of brightest natural objects in the sky
List_of_brightest_natural_objects_in_the_sky
Gravitational process studied in astronomy
star formation is occurring about 400–450 light-years distant in the ρ Ophiuchi cloud complex. A more compact site of star formation is the opaque clouds
Star_formation
Planetary system consisting of the Sun and objects orbiting it
star-forming regions are the Corona Australis Molecular Cloud, the Rho Ophiuchi cloud complex and the Taurus molecular cloud; the latter lies just beyond
Solar_System
Group of stars on the celestial sphere
(astronomy) Cygnus Rift Serpens–Aquila Rift Dark Horse (astronomy) Rho Ophiuchi cloud complex Emu in the sky IAU designated constellations – a list of
Constellation
Second brightest star in the southern constellation of Pictor
than about 1 AU from the star cannot directly cause the dust stream. 51 Ophiuchi The parallax can be converted into distance using the equation: D i s t
Beta_Pictoris
Classification of stars based on spectral properties
K0III – Pollux K0III – Epsilon Cygni K2V – Epsilon Eridani K2III – Kappa Ophiuchi K3III – Rho Boötis K5V – 61 Cygni A K5III – Gamma Draconis Class M stars
Stellar_classification
Planet outside of the Solar System
the nineteenth century. Some of the earliest involve the binary star 70 Ophiuchi. In 1855, William Stephen Jacob at the East India Company's Madras Observatory
Exoplanet
Star in the constellation Ophiuchus
12 Ophiuchi is a variable star 32.3 light-years away in the constellation Ophiuchus. No companions have yet been detected in orbit around this star, and
12_Ophiuchi
Nova seen in 1848 in the constellation Ophiuchus
V841 Ophiuchi (Nova Ophiuchi 1848) was a bright nova discovered by John Russell Hind on 27 April 1848. It was the first object of its type discovered
V841_Ophiuchi
Hony, S.; de Koter, A.; Molenberghs, G.; Dehaes, S.; Markwick-Kemper, F. (30 July 2007). "The variable mass loss of the AGB star WX Piscium as traced by
List_of_largest_stars
(August 2009), "Imaging and Modeling Rapidly Rotating Stars: α Cephei and α Ophiuchi", The Astrophysical Journal, 701 (1): 209–224, arXiv:0906.2241, Bibcode:2009ApJ
List of nearest stars by spectral type
List_of_nearest_stars_by_spectral_type
01–2.10var) Mirach β Andromedae 0200 M0 III Northern 56 2.07 Rasalhague α Ophiuchi 0047 A5IVnn Northern 57 2.08 (2.37 + 3.64) Algieba γ Leonis 0130 K0 III
List_of_brightest_stars
Aboriginal nation in eastern Australia
maximum thickness with ε Scorpii and λ Scorpii, and tapering towards 36-Ophiuchi and 3-Sagittarii, eventually ending near μ Sagittarii." (Fuller et al.
Gamilaraay
Astrophysical phenomenon
355–370. Bibcode:1982ASIC...90..355C. Baade, W. (1943). "No. 675. Nova Ophiuchi of 1604 as a supernova". Contributions from the Mount Wilson Observatory
Supernova
Type of supernova in binary systems
Supernovae". In Evans, A.; Bode, M.F.; O'Brien, T.J.; Darnley, M.J. (eds.). RS Ophiuchi (2006) and the Recurrent Nova Phenomenon. ASP Conference Series. Vol. 401
Type_Ia_supernova
Comparison of a wide range of lengths
metric system equal to 10−30 metres. To help compare different orders of magnitude, this section lists lengths shorter than 10−30 m (1 qm). 0 quectometres
Orders_of_magnitude_(length)
630.1 CM Draconis Draco 48.47 ± 0.02 12.87 M4.5V + M4.5V + DQ8 631 12 Ophiuchi Ophiuchius 32.27 ± 0.02 5.77 K1V 632 HD 150706 Ursa Minor 91.92 ± 0.03
List of Gliese and GJ objects (1-1000)
List_of_Gliese_and_GJ_objects_(1-1000)
within 20–25 light-years List of star systems within 25–30 light-years List of star systems within 30–35 light-years List of star systems within 35–40 light-years
Lists_of_stars
Star with a protoplanetary disk around it
spiral structure. Elias 2-27 is located near the double star Rho Ophiuchi (5 Ophiuchi). In 2016, it was discovered that disk perturbations from density
Elias_2-27
Event when planets are seen to pass one another
diameter of 10.6") will transit in front of Jupiter (with an angular diameter of 30.9"); however, this will take place only 8° west of the Sun, and will therefore
Planetary transits and occultations
Planetary_transits_and_occultations
Scientific study of celestial objects
filaments, clusters and voids in the Universe. Astrochemistry the Rho Ophiuchi cloud complex imaged by the JWST (NIRCam), showing jets from young stars
Astronomy
Group of stars
an embedded cluster is the Trapezium Cluster in the Orion Nebula. In ρ Ophiuchi cloud (L1688) core region there is an embedded cluster. The embedded cluster
Star_cluster
are currently moving within (or near) the Local Interstellar Cloud, roughly 30 light-years (9.2 pc) across. The Local Interstellar Cloud is, in turn, contained
List_of_nearest_stars
Brightest star in the constellation Aquila
S2CID 13969695. "the definition of altair". www.dictionary.com. Retrieved 2018-09-30. "IAU Working Group on Star Names (WGSN)". Archived from the original on 23
Altair
Star system in the constellation Ursa Major
Xi Ursae Majoris is the second-nearest quintuple system, after V1054 Ophiuchi. Xi Ursae Majoris was found to be a visual double star by William Herschel
Xi_Ursae_Majoris
Astronomical theory about the Solar System
protostars: circumstellar material and young stellar objects in the ρ Ophiuchi cloud". The Astrophysical Journal. 420: 837–862. Bibcode:1994ApJ...420
Nebular_hypothesis
Type of interstellar cloud
clouds have a typical density of 30 particles per cubic centimetre. Sagittarius B2 Serpens-Aquila Rift Rho Ophiuchi cloud complex Rosette Molecular Cloud
Molecular_cloud
Planet not gravitationally bound to a star
star-forming regions with iPMOs with disks or accretion are Lupus I, Rho Ophiuchi Cloud Complex, Sigma Orionis cluster, Orion Nebula, Taurus, NGC 1333 and
Rogue_planet
Large self-illuminated object in space
Union (IAU). Retrieved 30 January 2009. "Naming Stars". Students for the Exploration and Development of Space (SEDS). Retrieved 30 January 2009. Lyall,
Star
Star in the constellation Ursa Major
days or less; or exceeding 10 MJ at about Jupiter's orbital distance. 70 Ophiuchi Barnard's Star List of nearest stars and brown dwarfs Wolf 359 Roman, Nancy
Lalande_21185
unseen companion was affecting the position of the star he cataloged as 70 Ophiuchi. The first known formal astrometric calculation for an extrasolar planet
Methods of detecting exoplanets
Methods_of_detecting_exoplanets
Spectroscopy and VLTI/GRAVITY Astrometry, arXiv:2509.20621, retrieved 2025-09-30 Picos, D. González; Snellen, I. A. G.; Regt, S. de; Landman, R.; Zhang, Y
List of star systems within 450–500 light-years
List_of_star_systems_within_450–500_light-years
+11.6 −7.8 18h 28m 31.10s 26° 50′ 37.79″ Y2 has 1 possible planet. Alpha Ophiuchi (Rasalhague) A$ 46.7 ± 0.6 Ophiuchus 17h 34m 56.06945s +12° 33′ 36.1346″
List of star systems within 45–50 light-years
List_of_star_systems_within_45–50_light-years
Binary star system in the constellation Aquila
(August 1989), "Astrometric-spectroscopic binary star orbits. III - Alpha Ophiuchi and Delta Aquilae", Astronomical Journal, 98: 686–691, Bibcode:1989AJ.
Delta_Aquilae
Globular cluster in the constellation Scorpius
telescopes and binoculars. M80 is on the far-right edge of this image of Rho Ophiuchi cloud complex toward the top Map showing the location of M80 A Hubble Space
Messier_80
50-km wide asteroid named after Rome, Italy
Thursday, 8 July 2010, this 50 km wide asteroid occulted the star Delta Ophiuchi in an event lasting about five seconds. The occultation path crossed central
472_Roma
Theoretical propulsion system capable of interstellar distances
Watts, The Freeze Frame Revolution (2016) In John Varley's 1977 novel The Ophiuchi Hotline, a black hole engine is used to move a moon of Jupiter to Alpha
Black_hole_starship
English astronomer (1823–1895)
discovered the variability of μ Cephei. Hind discovered Nova Ophiuchi 1848 (V841 Ophiuchi), the first object of its type discovered since 1670. Hind's
John_Russell_Hind
Star in the constellation Camelopardalis
dwarf C 70 Ophiuchi (16.7074±0.0087 ly) K-type main-sequence star B Gliese 570 (19.1987±0.0074 ly) 2 red dwarfs: B, C T-type brown dwarf D 36 Ophiuchi (19.4185±0
Gliese_445
D K1(V) 7.43 E 90.92 ± 0.06 K1(V) 7.81 Kappa Ophiuchi$ 91.5±0.5 Ophiuchus 16h 57m 40.09785s +09° 22′ 30.1126″ K2III 3.20# 35.66±0.20 13 Orionis 92 Orion
List of star systems within 90–95 light-years
List_of_star_systems_within_90–95_light-years
Interplanetary introduction of species
directed panspermia may aim at star-forming interstellar clouds such as Rho Ophiuchi cloud complex (427 ly), that contains clusters of new stars too young to
Directed_panspermia
Comments and references Zeta Ophiuchi 440 ± 40 1 O9.5 V 2.56 – 2.58 The closest O-type star to Earth. Phi Persei B 720 ± 30 1 sdO 4.06 Has a B-type companion
List_of_O-type_stars
Constellation in the northern celestial hemisphere
associated with a stream of about 70 stars including Delta Leonis and Alpha Ophiuchi; the proper motion of this group is comparable to that of the Ursa Major
Auriga
Journal Supplement Series. 229 (2): 30. arXiv:1609.04128. Bibcode:2017ApJS..229...30M. doi:10.3847/1538-4365/229/2/30. S2CID 39426786. Kalomeni, B.; Yakut
List_of_smallest_known_stars
Comet outside the Solar System
The majority of discovered exocometary systems (Beta Pictoris, HR 10, 51 Ophiuchi, HR 2174, HD 85905, 49 Ceti, 5 Vulpeculae, 2 Andromedae, HD 21620, Rho
Exocomet
Ancient state in northern China (11th century BC – 222 BC)
in the "Black Tortoise" symbol. Yan is also represented by the star Nu Ophiuchi in the "Left Wall" asterism in the "Heavenly Market" enclosure. Bronzeware
Yan_(state)
Feudal state in the Zhou dynasty, China
Fengsheng village and later Duke Yansheng. Song is represented by the star Eta Ophiuchi in the asterism Left Wall, Heavenly Market enclosure (see Chinese constellation)
Song_(state)
Chinese Zhou dynasty state (c.1030 BC – 223 BC)
star is Phi or 24 Capricorni. It is also represented by the star Epsilon Ophiuchi in the "Right Wall" asterism in the "Heavenly Market" enclosure. The virus
Chu_(state)
Small patches of nebulosity associated with newly born stars
protostars: Circumstellar material and young stellar objects in the rho Ophiuchi cloud". Astrophysical Journal. 420 (2): 837–862. Bibcode:1994ApJ...420
Herbig–Haro_object
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