HD 56618

HD 56618
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 07h 16m 34.99315s[1]
Declination −27° 52′ 52.2453″[1]
Apparent magnitude (V) 4.66[2]
Characteristics
Evolutionary stage AGB[3]
Spectral type M2III[4]
B−V color index 1.589±0.028[2]
Astrometry
Radial velocity (Rv)+41.5±2.8[2] km/s
Proper motion (μ) RA: −13.479[1] mas/yr
Dec.: +38.625[1] mas/yr
Parallax (π)8.3189 ± 0.2874 mas[1]
Distance390 ± 10 ly
(120 ± 4 pc)
Absolute magnitude (MV)−0.80[2]
Details
Radius61.1+7.3
−6.9[1] R☉
Luminosity699.7±27.3[1] L☉
Temperature3,797+233
−209[1] K
Other designations
CD−27°3852, FK5 2562, HD 56618, HIP 35205, HR 2766, SAO 173360[5]
Database references
SIMBADdata

HD 56618 is a single[6] star in the southern constellation of Canis Major. It is a red-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.66.[2] This object is located at a distance of approximately 390 light years from the Sun based on parallax measurements. It is drifting further away with a radial velocity of +41.5 km/s,[2] having come to within 203 light-years some 2.2 million years ago.[2] Olin J. Eggen listed it as a probable member of the Hyades supercluster.[7]

This is an aging red giant star currently on the asymptotic giant branch[3] with a stellar classification of M2III.[4] It is no longer undergoing core hydrogen fusion and has expanded to 61[1] times the radius of the Sun. The star is radiating 700[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,797 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggen1985 was invoked but never defined (see the help page).