HD 36678

HD 36678
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 36m 35.21858s[1]
Declination +54° 25′ 43.1638″[1]
Apparent magnitude (V) 5.8334[2]
Characteristics
Spectral type M0III[3]
U−B color index +1.98[4]
B−V color index +1.671±0.006[5]
Variable type suspected[6]
Astrometry
Radial velocity (Rv)1.10±0.43[2] km/s
Proper motion (μ) RA: −6.531[1] mas/yr
Dec.: −10.196[1] mas/yr
Parallax (π)3.9037 ± 0.1314 mas[1]
Distance840 ± 30 ly
(256 ± 9 pc)
Absolute magnitude (MV)–1.00[5]
Details
Mass1.38[7] M☉
Radius63.2+7.0
−4.7[1] R☉
Luminosity875±34[1] L☉
Surface gravity (log g)0.79[7] cgs
Temperature3,950+154
−202[1] K
Metallicity [Fe/H]−0.12[7] dex
Other designations
BD+54°914, HD 36678, HIP 26344, HR 1866, SAO 25276
Database references
SIMBADdata

HD 36678 is single[8] star in the northern constellation of Auriga. This star is dimly visible to the naked eye with an apparent visual magnitude of 5.83.[2] It is located at a distance of approximately 840 light years from the Sun based on parallax.[1]

This is an aging red giant star with a stellar classification of M0III.[3] It is currently on the asymptotic giant branch of the HR diagram,[3] and has expanded to ~63[1] times the radius of the Sun. The star is radiating ~875[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,950 K.[1]

The brightness of HD 36678 is suspected of being variable. Hipparcos photometry showed maximum and minimum apparent magnitudes of 5.806 and 5.855 respectively, in the Hipparcos photometric band.[6] No period was found, the variability has not been confirmed, and the star is not formally listed as a variable star.[9]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference aa430_165 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference eggen was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference tycho was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference starhorse was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton_Tokovinin_2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).