HD 82741

HD 82741
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 09h 35m 03.83005s[1]
Declination +39° 37′ 17.3743″[1]
Apparent magnitude (V) 4.81[2]
Characteristics
Spectral type G9.5 IIIb Fe-1[3]
B−V color index 0.980[4]
Astrometry
Radial velocity (Rv)0.992±0.002[2] km/s
Proper motion (μ) RA: −30.124[1] mas/yr
Dec.: +20.155[1] mas/yr
Parallax (π)14.6281 ± 0.2230 mas[1]
Distance223 ± 3 ly
(68 ± 1 pc)
Absolute magnitude (MV)0.573[4]
Details
Mass1.62[5] M☉
Radius11[6] R☉
Luminosity58.9[5] L☉
Surface gravity (log g)2.6[6] cgs
Temperature4,809±51[5] K
Metallicity [Fe/H]−0.18[4] dex
Rotational velocity (v sin i)1.0[6] km/s
Age2.74[5] Gyr
Other designations
BD+40° 2224, FK5 2762, HD 82741, HIP 47029, HR 3809, SAO 61578[7]
Database references
SIMBADdata

HD 82741 is a single[8] star in the northern constellation of Lynx. It is visible to the naked eye with an apparent visual magnitude of 4.81.[2] The distance to HD 82741 is 223 light years, as determined from its annual parallax shift of 14.6 mas.[1] It is moving further from the Earth with a heliocentric radial velocity of 1 km/s.[2]

At the age of 2.74[5] billion years, this is an evolved giant star with a stellar classification of G9.5 IIIb Fe-1,[3] where the suffix notation indicates an underabundance of iron in its atmosphere. It belongs to a sub-category of giants called the red clump, indicating that it is on the horizontal branch and is generating energy through the fusion of helium at its core.[9] With 1.62[5] times the mass of the Sun, it has expanded to 11[6] times the Sun's radius. It is radiating 58.9[5] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,809 K.[5]

  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 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 c Cite error: The named reference Soubiran2008 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Massarotti2008 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 Alves2000 was invoked but never defined (see the help page).