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HD 74772

This article is about d Velorum. Not to be confused with δ Velorum.
HD 74772
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 08h 44m 23.94539s[1]
Declination −42° 38′ 57.3933″[1]
Apparent magnitude (V) 4.05[2]
Characteristics
Spectral type G6 III[3]
B−V color index 0.874±0.002[2]
Astrometry
Radial velocity (Rv)−2.0±0.3[4] km/s
Proper motion (μ) RA: −22.641[1] mas/yr
Dec.: +19.137[1] mas/yr
Parallax (π)15.7791 ± 0.3148 mas[1]
Distance207 ± 4 ly
(63 ± 1 pc)
Absolute magnitude (MV)−0.18[2]
Details
Mass3.2[5] M☉
Radius12[6] R☉
Luminosity128.02[2] L☉
Surface gravity (log g)2.50[7] cgs
Temperature5,210[7] K
Metallicity [Fe/H]−0.03[7] dex
Rotational velocity (v sin i)5.8[8] km/s
Other designations
d Vel, CD−42° 4569, GJ 9276, HD 74772, HIP 42884, HR 3477, SAO 220371, WDS J08444-4239A[9]
Database references
SIMBADdata

HD 74772 (d Velorum) is a single[10] star in the southern constellation of Vela. It is positioned near the Vela SNR, which gives it an intense X-ray background.[11] The star is of apparent visual magnitude 4.05,[2] and hence is visible to the naked eye. Based upon an annual parallax shift of 15.8 mas,[1] it is located 207 light years from the Sun. It is moving closer to the Earth with a heliocentric radial velocity of −2 km/s.[4]

This is an evolved G-type giant star with a stellar classification of G6 III.[3] The interferometry-measured angular diameter of this star is 1.73±0.12 mas,[12] which, at its estimated distance, equates to a physical radius of about 12 times the radius of the Sun.[6] It has 3.2[5] times the mass of the Sun and is radiating 128[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,210 K.[7]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gondoin1999 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Jones1992 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference deMedeiros1995 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 Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Maggio1993 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).

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