69 Orionis

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
SIMBADdata

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]

  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 d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Lesh1968 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Evans1967 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Zorec2016 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 Gontcharov2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Buoy2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Bossi1981 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Goraya1996 was invoked but never defined (see the help page).