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30 Ophiuchi

January 01, 1970

30 Ophiuchi is a single[10] star in the equatorial constellation of Ophiuchus, and figures 0.99° east (specifically E½S) of the heart of cluster Messier 10.[11] It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.82.[2] The distance to this star is approximately 350 light years based on parallax.[6] Its present motion is, net, one of approaching rather than parting, at −6.7 km/s, its "radial velocity".[5]

30 Ophiuchi
Location of 30 Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 01m 03.60142s[1]
Declination −4° 13′ 21.5308″[1]
Apparent magnitude (V) 4.82[2]
Characteristics
Spectral type K4III[3]
U−B color index +1.80[4]
B−V color index +1.48[4]
Astrometry
Radial velocity (Rv)−6.70[5] km/s
Proper motion (μ) RA: −39.13[6] mas/yr
Dec.: −78.09[6] mas/yr
Parallax (π)9.3138 ± 0.1676 mas[1]
Distance350 ± 6 ly
(107 ± 2 pc)
Absolute magnitude (MV)−0.65[2]
Details
Radius35.89+0.54
−2.12[1] R☉
Luminosity299.8±6.2[1] L☉
Surface gravity (log g)1.73[7] cgs
Temperature4,009.00+126.67
−29.67[1] K
Metallicity [Fe/H]−0.03[2] dex
Rotational velocity (v sin i)1.4[8] km/s
Other designations
30 Oph, NSV 8111, BD−04°4215, FK5 1445, GC 22937, HD 153687, HIP 83262, HR 6318, SAO 141483, CCDM J17011-0413A, WDS J17011-0413A[9]
Database references
SIMBADdata

This is an aging giant star with a stellar classification of K4III,[3] having exhausted the supply of hydrogen at its core and expanded to 36[1] times the Sun's radius. It is a suspected variable star.[12] The star is radiating 300[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,009 K.[1] It is emitting a far infrared excess due to circumstellar dust,[13] which extends out to a diameter of 240 AU and has a mass of 62×1025 g.[14]

The primary presents with two visual companions: B, at magnitude 9.71 and separation 99.8″, and C, at magnitude 8.75 and separation 220.9″ (3′ 40.9″).[15]

References edit

  1. ^ a b c d e f g h i Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^ a b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. ^ a b c Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  7. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
  8. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID 54046583. Vizier catalog entry
  9. ^ "30 Oph". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-19.
  10. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  11. ^ O'Meara, Stephen James (1998). Deep-Sky Companions: The Messier Objects. Cambridge University Press. p. 63. ISBN 9780521553322.
  12. ^ Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  13. ^ Zuckerman, B.; et al. (June 1995). "Luminosity Class III Stars with Excess Far-Infrared Emission". Astrophysical Journal Letters. 446: L79. Bibcode:1995ApJ...446L..79Z. doi:10.1086/187935.
  14. ^ Jura, M. (April 1999). "Dust around First-Ascent Red Giants". The Astrophysical Journal. 515 (2): 706–711. Bibcode:1999ApJ...515..706J. doi:10.1086/307064.
  15. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry

January 01, 1970
ophiuchi, single, star, equatorial, constellation, ophiuchus, figures, east, specifically, heart, cluster, messier, visible, naked, faint, orange, hued, point, light, with, apparent, visual, magnitude, distance, this, star, approximately, light, years, based, . 30 Ophiuchi is a single 10 star in the equatorial constellation of Ophiuchus and figures 0 99 east specifically E S of the heart of cluster Messier 10 11 It is visible to the naked eye as a faint orange hued point of light with an apparent visual magnitude of 4 82 2 The distance to this star is approximately 350 light years based on parallax 6 Its present motion is net one of approaching rather than parting at 6 7 km s its radial velocity 5 30 OphiuchiLocation of 30 Ophiuchi circled Observation dataEpoch J2000 Equinox J2000 Constellation Ophiuchus Right ascension 17h 01m 03 60142s 1 Declination 4 13 21 5308 1 Apparent magnitude V 4 82 2 Characteristics Spectral type K4III 3 U B color index 1 80 4 B V color index 1 48 4 AstrometryRadial velocity Rv 6 70 5 km sProper motion m RA 39 13 6 mas yr Dec 78 09 6 mas yrParallax p 9 3138 0 1676 mas 1 Distance350 6 ly 107 2 pc Absolute magnitude MV 0 65 2 DetailsRadius35 89 0 54 2 12 1 R Luminosity299 8 6 2 1 L Surface gravity log g 1 73 7 cgsTemperature4 009 00 126 67 29 67 1 KMetallicity Fe H 0 03 2 dexRotational velocity v sin i 1 4 8 km s Other designations30 Oph NSV 8111 BD 04 4215 FK5 1445 GC 22937 HD 153687 HIP 83262 HR 6318 SAO 141483 CCDM J17011 0413A WDS J17011 0413A 9 Database referencesSIMBADdata This is an aging giant star with a stellar classification of K4III 3 having exhausted the supply of hydrogen at its core and expanded to 36 1 times the Sun s radius It is a suspected variable star 12 The star is radiating 300 1 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4 009 K 1 It is emitting a far infrared excess due to circumstellar dust 13 which extends out to a diameter of 240 AU and has a mass of 62 1025 g 14 The primary presents with two visual companions B at magnitude 9 71 and separation 99 8 and C at magnitude 8 75 and separation 220 9 3 40 9 15 References edit a b c d e f g h i Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR a b c d Anderson E Francis Ch 2012 XHIP An extended hipparcos compilation Astronomy Letters 38 5 331 arXiv 1108 4971 Bibcode 2012AstL 38 331A doi 10 1134 S1063773712050015 S2CID 119257644 Vizier catalog entry a b Hoffleit D Warren W H 1995 VizieR Online Data Catalog Bright Star Catalogue 5th Revised Ed Hoffleit 1991 VizieR On line Data Catalog V 50 Originally Published in 1964BS C 0H 5050 Bibcode 1995yCat 5050 0H a b Mallama A 2014 Sloan Magnitudes for the Brightest Stars The Journal of the American Association of Variable Star Observers 42 2 443 Bibcode 2014JAVSO 42 443M Vizier catalog entry a b Gontcharov G A 2006 Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system Astronomy Letters 32 11 759 771 arXiv 1606 08053 Bibcode 2006AstL 32 759G doi 10 1134 S1063773706110065 S2CID 119231169 a b c Van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 Vizier catalog entry Soubiran Caroline Le Campion Jean Francois Brouillet Nathalie Chemin Laurent 2016 The PASTEL catalogue 2016 version Astronomy amp Astrophysics 591 A118 arXiv 1605 07384 Bibcode 2016A amp A 591A 118S doi 10 1051 0004 6361 201628497 S2CID 119258214 De Medeiros J R Alves S Udry S Andersen J Nordstrom B Mayor M 2014 A catalog of rotational and radial velocities for evolved stars Astronomy amp Astrophysics 561 A126 arXiv 1312 3474 Bibcode 2014A amp A 561A 126D doi 10 1051 0004 6361 201220762 S2CID 54046583 Vizier catalog entry 30 Oph SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2019 06 19 Eggleton P P Tokovinin A A September 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 879 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 O Meara Stephen James 1998 Deep Sky Companions The Messier Objects Cambridge University Press p 63 ISBN 9780521553322 Samus N N et al 2017 General Catalogue of Variable Stars Astronomy Reports 5 1 61 1 80 88 Bibcode 2017ARep 61 80S doi 10 1134 S1063772917010085 S2CID 125853869 Zuckerman B et al June 1995 Luminosity Class III Stars with Excess Far Infrared Emission Astrophysical Journal Letters 446 L79 Bibcode 1995ApJ 446L 79Z doi 10 1086 187935 Jura M April 1999 Dust around First Ascent Red Giants The Astrophysical Journal 515 2 706 711 Bibcode 1999ApJ 515 706J doi 10 1086 307064 Mason Brian D Wycoff Gary L Hartkopf William I Douglass Geoffrey G Worley Charles E 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 Bibcode 2001AJ 122 3466M doi 10 1086 323920 Vizier catalog entry Retrieved from https en wikipedia org w index php title 30 Ophiuchi amp oldid 1170066651, wikipedia, wiki, book, books, library,

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