HD 77912

HD 77912
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 09h 06m 31.76860s[1]
Declination +38° 27′ 07.9756″[1]
Apparent magnitude (V) 4.56[2]
Characteristics
Spectral type G7 II Ba0.2[3]
B−V color index 1.037±0.003[4]
Astrometry
Radial velocity (Rv)+16.6±0.2[4] km/s
Proper motion (μ) RA: −27.653[1] mas/yr
Dec.: −15.055[1] mas/yr
Parallax (π)5.0045 ± 0.1977 mas[1]
Distance650 ± 30 ly
(200 ± 8 pc)
Absolute magnitude (MV)−1.46±0.093[5]
Details
Mass4.60[6] M☉
Radius33±5[2] R☉
Luminosity1,168.35[4] L☉
Surface gravity (log g)1.75[6] cgs
Temperature4,899[6] K
Metallicity [Fe/H]−0.14[6] dex
Other designations
BD+39°2200, FK5 1237, HD 77912, HIP 44700, HR 3612, SAO 61254[7]
Database references
SIMBADdata

HD 77912 is a single[8] star in the northern constellation of Lynx. It is visible to the naked eye with an apparent visual magnitude of 4.56.[2] The star is located 650 light years from the Sun, as determined from its annual parallax shift of 5.0 mas.[1] It is moving further away with a heliocentric radial velocity of +16.6 km/s.[4] HD 77912 has a peculiar velocity of 23.1+2.9
−1.1 km/s, which may mark it as a runaway star.[9]

The stellar classification of HD 77912 is G7 II Ba0.2,[3] indicating it is a bright giant with a mild overabundance of barium. It has 4.6[6] times the mass of the Sun and has expanded to 33[2] times the Sun's radius. The star is radiating 1,168[4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,899 K.[6]

  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 Cite error: The named reference vanBelle2009 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Lu1991 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference park2013 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Liu2014 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).