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This article is about f1 Orionis. For other stars with this Bayer designation, see f Orionis.
69 Orionis
Location of 69 Orionis (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Orion
Right ascension 06h 12m 03.27955s [1]
Declination 16° 07′ 49.4614″ [1]
Apparent magnitude (V) 4.92 [2]
Characteristics
Evolutionary stage main sequence
Spectral type B5Vn [3]
U−B color index −0.59 [2]
B−V color index −0.12 [2]
Astrometry
Radial velocity (Rv)+22.00 [4] km/s
Proper motion (μ) RA: +5.49 [1]  mas/ yr
Dec.: −16.80 [1]  mas/ yr
Parallax (π)6.17 ± 0.25  mas [1]
Distance530 ± 20  ly
(162 ± 7  pc)
Absolute magnitude (MV)−1.09 [5]
Details [6]
Mass6.4±0.2  M☉
Radius3.4 [7]  R☉
Luminosity1,442+248
−212  L☉
Surface gravity (log g)4.05±0.17  cgs
Temperature17,090  K
Metallicity [Fe/H]+0.01 [8]  dex
Rotational velocity (v sin i)285±23 km/s
Age10–40 [9]  Myr
Other designations
f1 Ori, 69 Ori, BD+16°1035, GC 7891, HD 42545, HIP 29434, HR 2198, SAO 95365 [10]
Database references
SIMBAD data

69 Orionis is a single [11] star in the equatorial constellation of Orion, positioned a couple of degrees to the north of Xi Orionis. It has the Bayer designation f1 Orionis; 69 Orionis is the Flamsteed designation. The star is visible to the naked eye as faint, blue-white hued point of light with an apparent visual magnitude of 4.92. [2] It is located approximately 530  light-years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +22 km/s. [4] In 2015, H. Bouy and J. Alves suggested that it is a member of the newly discovered Taurion OB association. [9]

This object is a B-type main-sequence star with a stellar classification of B5Vn, [3] where the 'n' suffix indicates "nebulous" (broad) lines due to rapid rotation. It has a projected rotational velocity of 285 km/s, compared to a critical velocity of 476±37  km/s; the polar axis is inclined by 64°±16°. [6] This is a known Be star [12] that began behaving as a normal star in November, 1982. [13] It has 6.4 times the mass of the Sun and is radiating around 1,442 times the Sun's luminosity from its photosphere at an effective temperature of 17,090  K. [6]

References

  1. ^ a b c d e f 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.
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  3. ^ a b Lesh, Janet Rountree (December 1968). "The Kinematics of the Gould Belt: an Expanding Group?". Astrophysical Journal Supplement. 17: 371. Bibcode: 1968ApJS...17..371L. doi: 10.1086/190179.
  4. ^ a b Evans, D. S. (1967). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and Their Applications. 30: 57. Bibcode: 1967IAUS...30...57E.
  5. ^ 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
  6. ^ a b c Zorec, J.; et al. (2016). "Critical study of the distribution of rotational velocities of Be stars". Astronomy & Astrophysics. 595: A132. Bibcode: 2016A&A...595A.132Z. doi: 10.1051/0004-6361/201628760. hdl: 11336/37946.
  7. ^ Pasinetti Fracassini, L. E.; et al. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics. 367 (2) (Third ed.): 521–524. arXiv: astro-ph/0012289. Bibcode: 2001A&A...367..521P. doi: 10.1051/0004-6361:20000451. S2CID  425754.
  8. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814. Bibcode: 2012AstL...38..771G. doi: 10.1134/S1063773712120031. S2CID  118345778. Vizier catalog entry
  9. ^ a b Bouy, H.; Alves, J. (December 2015). "Cosmography of OB stars in the solar neighbourhood". Astronomy & Astrophysics. 584: 13. Bibcode: 2015A&A...584A..26B. doi: 10.1051/0004-6361/201527058. A26.
  10. ^ "69 Ori". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-06.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  12. ^ Bossi, M.; et al. (November 1981). "Spectroscopic and photometric observations of the Be star 69 Orionis". Astronomy and Astrophysics Supplement Series. 46: 173–177. Bibcode: 1981A&AS...46..173B.
  13. ^ Goraya, P. S.; Tur, N. S. (February 1996). "Spectrophotometric Study of Four Bright Be Stars". Astrophysics and Space Science. 236 (2): 175–183. Bibcode: 1996Ap&SS.236..175G. doi: 10.1007/BF00645142. S2CID  123576634.
Retrieved from " https://en.wikipedia.org/?title=69_Orionis&oldid=1195790043"
From Wikipedia, the free encyclopedia
This article is about f1 Orionis. For other stars with this Bayer designation, see f Orionis.
69 Orionis
Location of 69 Orionis (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Orion
Right ascension 06h 12m 03.27955s [1]
Declination 16° 07′ 49.4614″ [1]
Apparent magnitude (V) 4.92 [2]
Characteristics
Evolutionary stage main sequence
Spectral type B5Vn [3]
U−B color index −0.59 [2]
B−V color index −0.12 [2]
Astrometry
Radial velocity (Rv)+22.00 [4] km/s
Proper motion (μ) RA: +5.49 [1]  mas/ yr
Dec.: −16.80 [1]  mas/ yr
Parallax (π)6.17 ± 0.25  mas [1]
Distance530 ± 20  ly
(162 ± 7  pc)
Absolute magnitude (MV)−1.09 [5]
Details [6]
Mass6.4±0.2  M☉
Radius3.4 [7]  R☉
Luminosity1,442+248
−212  L☉
Surface gravity (log g)4.05±0.17  cgs
Temperature17,090  K
Metallicity [Fe/H]+0.01 [8]  dex
Rotational velocity (v sin i)285±23 km/s
Age10–40 [9]  Myr
Other designations
f1 Ori, 69 Ori, BD+16°1035, GC 7891, HD 42545, HIP 29434, HR 2198, SAO 95365 [10]
Database references
SIMBAD data

69 Orionis is a single [11] star in the equatorial constellation of Orion, positioned a couple of degrees to the north of Xi Orionis. It has the Bayer designation f1 Orionis; 69 Orionis is the Flamsteed designation. The star is visible to the naked eye as faint, blue-white hued point of light with an apparent visual magnitude of 4.92. [2] It is located approximately 530  light-years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +22 km/s. [4] In 2015, H. Bouy and J. Alves suggested that it is a member of the newly discovered Taurion OB association. [9]

This object is a B-type main-sequence star with a stellar classification of B5Vn, [3] where the 'n' suffix indicates "nebulous" (broad) lines due to rapid rotation. It has a projected rotational velocity of 285 km/s, compared to a critical velocity of 476±37  km/s; the polar axis is inclined by 64°±16°. [6] This is a known Be star [12] that began behaving as a normal star in November, 1982. [13] It has 6.4 times the mass of the Sun and is radiating around 1,442 times the Sun's luminosity from its photosphere at an effective temperature of 17,090  K. [6]

References

  1. ^ a b c d e f 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.
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  3. ^ a b Lesh, Janet Rountree (December 1968). "The Kinematics of the Gould Belt: an Expanding Group?". Astrophysical Journal Supplement. 17: 371. Bibcode: 1968ApJS...17..371L. doi: 10.1086/190179.
  4. ^ a b Evans, D. S. (1967). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and Their Applications. 30: 57. Bibcode: 1967IAUS...30...57E.
  5. ^ 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
  6. ^ a b c Zorec, J.; et al. (2016). "Critical study of the distribution of rotational velocities of Be stars". Astronomy & Astrophysics. 595: A132. Bibcode: 2016A&A...595A.132Z. doi: 10.1051/0004-6361/201628760. hdl: 11336/37946.
  7. ^ Pasinetti Fracassini, L. E.; et al. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics. 367 (2) (Third ed.): 521–524. arXiv: astro-ph/0012289. Bibcode: 2001A&A...367..521P. doi: 10.1051/0004-6361:20000451. S2CID  425754.
  8. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814. Bibcode: 2012AstL...38..771G. doi: 10.1134/S1063773712120031. S2CID  118345778. Vizier catalog entry
  9. ^ a b Bouy, H.; Alves, J. (December 2015). "Cosmography of OB stars in the solar neighbourhood". Astronomy & Astrophysics. 584: 13. Bibcode: 2015A&A...584A..26B. doi: 10.1051/0004-6361/201527058. A26.
  10. ^ "69 Ori". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-06.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  12. ^ Bossi, M.; et al. (November 1981). "Spectroscopic and photometric observations of the Be star 69 Orionis". Astronomy and Astrophysics Supplement Series. 46: 173–177. Bibcode: 1981A&AS...46..173B.
  13. ^ Goraya, P. S.; Tur, N. S. (February 1996). "Spectrophotometric Study of Four Bright Be Stars". Astrophysics and Space Science. 236 (2): 175–183. Bibcode: 1996Ap&SS.236..175G. doi: 10.1007/BF00645142. S2CID  123576634.
Retrieved from " https://en.wikipedia.org/?title=69_Orionis&oldid=1195790043"

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