HD 861

HD 861
Location of HD 861 (circled)
Observation data
Epoch J2000[1]      Equinox J2000[1]
Constellation Cassiopeia
Right ascension 00h 13m 12.73037s
Declination +62° 02′ 27.1598″
Apparent magnitude (V) 6.622[2]
Characteristics
Spectral type A2m[3] + GV[4]
B−V color index +0.208[2]
J−H color index +0.035[1]
J−K color index +0.059[1]
Astrometry
Radial velocity (Rv)8.80 ± 6.28[5] km/s
Proper motion (μ) RA: 72.804[6] mas/yr
Dec.: -19.171[6] mas/yr
Parallax (π)8.0883 ± 0.0269 mas[6]
Distance403 ± 1 ly
(123.6 ± 0.4 pc)
Absolute magnitude (MV)1.30 (A), 5.62 (B)[4]
Orbit[4]
PrimaryHD 861 A
CompanionHD 861 B
Period (P)15.9696 d
Eccentricity (e)0.124
Details[4]
HD 861 A
Mass2.04 M☉
Radius2.775 ± 0.139[7] R☉
Luminosity23.8[a] L☉
Surface gravity (log g)4.00 cgs
Temperature8100 K
Metallicity [Fe/H]0.44 dex
Rotational velocity (v sin i)37 km/s
Age724 Myr
HD 861 B
Mass0.95 M☉
Luminosity0.445[a] L☉
Surface gravity (log g)4.5 cgs
Temperature5500 K
Other designations
AG+61° 8, BD+61° 16, Gaia DR3 429778586841759104, GC 233, HD 861, HIP 1063, SAO 11044, PPM 12017, TIC 83612641, TYC 4018-687-1, GSC 04018-00687, 2MASS J00131272+6202271, Renson 130[1]
Database references
SIMBADHD 861

HD 861 is a spectroscopic binary star system in the deep northern constellation of Cassiopeia. With an apparent magnitude of 6.622, the star is faintly visible to the naked eye under very dark skies and readily visible using binoculars.[8] It is located approximately 403 light-years (124 parsecs) distant according to Gaia EDR3 parallax measurements, and is moving further away at a heliocentric radial velocity of 8.80 km/s.

  1. ^ a b c d Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference TYC2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Abt2009 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Iliev2006 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference DR3 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Kervella2019 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference bino was invoked but never defined (see the help page).


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