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Rho Scorpii information


ρ Scorpii
Location of ρ Scorpii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 15h 56m 53.07624s[1]
Declination −29° 12′ 50.6612″ [1]
Apparent magnitude (V) 3.86[2]
Characteristics
Spectral type B2 IV[3]
U−B color index -0.82[2]
B−V color index -0.20[2]
Astrometry
Radial velocity (Rv)−0.40[4] km/s
Proper motion (μ) RA: −15.68[1] mas/yr
Dec.: −24.88[1] mas/yr
Parallax (π)6.91 ± 0.19 mas[1]
Distance470 ± 10 ly
(145 ± 4 pc)
Absolute magnitude (MV)−1.93[5]
Orbit[6]
Period (P)4.0033 d
Eccentricity (e)0.27
Periastron epoch (T)2442178.6060 JD
Argument of periastron (ω)
(secondary)
231°
Semi-amplitude (K1)
(primary)
16.40 km/s
Details
Mass7.94±0.55[3] M
Radius5.0[7] R
Luminosity (bolometric)3,432[3] L
Temperature21,150[3] K
Rotational velocity (v sin i)113[8] km/s
Other designations
Iklil, 5 Scorpii, ADS 9846, CCDM J15569-2913A, FK5 3258, GC 21398, HD 142669, HIP 78104, HR 5928, SAO 183957, CD−28° 11714[9]
Database references
SIMBADdata

Rho Scorpii (ρ Scorpii, abbreviated Rho Sco, ρ Sco) is a double star in the constellation of Scorpius. It has an apparent visual magnitude of +3.87, which is bright enough to be seen with the naked eye. Based upon parallax measurements, it is located approximately 472 light years from the Sun.[1] At that distance, the visual magnitude of the system is reduced by 0.07 due to extinction from interstellar dust.[10] It is a member of the Upper Scorpius OB association.[11]

It has two components, designated Rho Scorpii A and B. Rho Scorpii A is itself a single-lined spectroscopic binary whose components are designated Rho Scorpii Aa (formally named Iklil /ˈɪklɪl/, traditionally the name for several neighboring stars)[12] and Ab.

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Evans1967 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Pourbaiz2004 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference cadars was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simón-Díaz2014 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Shatsky2002 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Greelman2015 was invoked but never defined (see the help page).
  12. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.

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Rho Scorpii

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Rho ScorpiiScorpii, abbreviated Rho Sco, ρ Sco) is a double star in the constellation of Scorpius. It has an apparent visual magnitude of +3.87, which...

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Rho Ophiuchi cloud complex

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Sigma Scorpii in the redish Sh2-9 area, with Messier 4 inbetween the latter two stars. North is up. July 2, 2019 photo by Adam Block. The Rho Ophiuchi...

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Antares

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designation α Scorpii, which is Latinised to Alpha Scorpii. Often referred to as "the heart of the scorpion", Antares is flanked by σ Scorpii and τ Scorpii near...

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Pi Scorpii

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consisting of Pi Scorpii, Rho Scorpii, Delta Scorpii, Beta¹ Scorpii and Beta² Scorpii. Consequently, the Chinese name for Pi Scorpii itself is 房宿一 (Fáng...

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List of Arabic star names

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star name Iklil Iklīl al Jabhah The Crown of the Forehead إكليل الجبهة Rho Scorpii Izar Al-Izar The girdle, or, The loin-cloth الإزار Epsilon Boötis...

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Sigma Scorpii

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Sigma Scorpii (or σ Scorpii, abbreviated Sigma Sco or σ Sco), is a multiple star system in the constellation of Scorpius, located near the red supergiant...

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Scorpius

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second brightest star in Scorpius. U Scorpii is the fastest known nova, with a period of about 10 years. AH Scorpii is a red supergiant star and one of...

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Omicron Scorpii

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Omicron Scorpii (ο Sco, ο Scorpii) is a star in the zodiac constellation of Scorpius. With an apparent visual magnitude of +4.57, it is visible to the...

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Rho Ophiuchi

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Rho Ophiuchi (ρ Ophiuchi) is a multiple star system in the constellation Ophiuchus. The central system has an apparent magnitude of 4.63. Based on the...

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22 Scorpii

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nebulous cloud IC 4605 located in the western regions of the Rho Ophiuchi cloud complex. 22 Scorpii is a B-type main-sequence star with a stellar classification...

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Messier 80

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designation T Scorpii, reached an absolute magnitude of −8.5, briefly outshining the cluster. M80 is on the far right edge of this image of Rho Ophiuchi cloud...

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IC 4592

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is a reflection nebula in the Scorpius constellation that is lit by Nu Scorpii. Media related to IC 4592 at Wikimedia Commons IC 4592 in NASA/IPAC Extragalactic...

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List of brightest natural objects in the sky

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Puppis Star Maximum brightness 2.81 2.68 Rho Puppis Star 2.81 Beta Draconis Binary star system 2.81 Tau Scorpii Star 2.81 Lambda Sagittarii Star 2.82 Alpha...

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Bayer designation

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constellations have uppercase letter designations, like B Centauri and G Scorpii. These letters were assigned by later astronomers, notably Lacaille in...

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Hypergiant

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Centauri Rho Cassiopeiae V382 Carinae V509 Cassiopeiae V766 Centauri (HR 5171A, possible red supergiant) V810 Centauri A V1427 Aquilae V915 Scorpii R Puppis...

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Eddington luminosity

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atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii". Astronomy & Astrophysics. 554: A76. arXiv:1305...

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Planetary transits and occultations

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1965 15:30 Mercury Eta Virginis 2.6° West 13 May 1971 20:00 Jupiter Beta Scorpii (both components) 169.5° West 8 April 1976 01:00 Mars Epsilon Geminorum...

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Supernova

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such systems that conveniently advertise themselves. One example is U Scorpii. The nearest known type Ia supernova candidate is IK Pegasi (HR 8210),...

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Astronomical naming conventions

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constellation Crux, the Southern Cross, Epsilon Carinae (ε Car) in Carina, Lambda Scorpii (λ Sco) in Scorpius and Sigma Sagittarii (σ Sgr) in Sagittarius. After...

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Corona Borealis

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handful of stars called recurrent novae, which include T Pyxidis and U Scorpii. An outburst of T Coronae Borealis was first recorded in 1866; its second...

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List of observatory codes

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Observatory - EHB01 Observatory, Engelhardsberg K78 iota Scorpii Observatory, obs.: Giulio Scarfì Li iota Scorpii Observatory, La Spezia K79 Erfurt Observatory TH...

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List of largest stars

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supergiant stars can be occulted by the Moon, including Antares A (Alpha Scorpii A). Examples of eclipsing binaries are Epsilon Aurigae (Almaaz), VV Cephei...

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Luminous blue variable

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HR Carinae V432 Carinae (Wray 15-751) V4029 Sagittarii (HD 168607) V905 Scorpii (HD 160529) V1672 Aquilae (AFGL 2298) W1-243 (in Westerlund 1) V481 Scuti...

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List of nearest giant stars

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Bibcode:2008MNRAS.384..173F. doi:10.1111/j.1365-2966.2007.12671.x. ISSN 0035-8711. "rho Pup". SIMBAD. Retrieved December 22, 2023. Rhee, Joseph H.; Song, Inseok;...

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List of supernova candidates

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Littlefair, S. P.; Marsh, T. R.; Smith, D. A. (2002). "The recurrent nova U Scorpii -- A type Ia supernova progenitor". The Physics of Cataclysmic Variables...

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Variable star

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vary predictably over a very long period. The best known example is V393 Scorpii. Beta Lyrae (β Lyr) variables are extremely close binaries, named after...

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