56 Ceti

56 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 56m 40.20314s[1]
Declination −22° 31′ 36.4091″[1]
Apparent magnitude (V) 4.85[2]
Characteristics
Spectral type K3III[3]
U−B color index +1.67[4]
B−V color index +1.434±0.005[5]
Astrometry
Radial velocity (Rv)+27.38±0.80[1] km/s
Proper motion (μ) RA: +59.881[1] mas/yr
Dec.: −25.633[1] mas/yr
Parallax (π)7.3878 ± 0.1861 mas[1]
Distance440 ± 10 ly
(135 ± 3 pc)
Absolute magnitude (MV)−0.25[5]
Details
Radius39.20+1.15
−2.93[1] R☉
Luminosity391+11
−20[1] L☉
Surface gravity (log g)1.85[2] cgs
Temperature4,099+163
−59[1] K
Metallicity [Fe/H]−0.18[2] dex
Other designations
56 Cet, CD−23°721, GC 2343, HD 11930, HIP 9061, HR 565, SAO 167416[6]
Database references
SIMBADdata

56 Ceti is a single[7] star located in the equatorial constellation of Cetus. Not found in the original Bayer catalogue, it was given the Bayer-like designation Upsilon1 Ceti by Flamsteed[8] to distinguish it from Bayer's Upsilon Ceti, which Flamsteed designated Upsilon2 or 59 Ceti. In 1801, J. E. Bode included this designation in his Uranographia,[9] but the superscripted designations Upsilon1 and Upsilon2 are not in general use today. 56 Ceti is the Flamsteed designation for this star.

This star is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.85.[2] It is located about 440 light years from the Sun, based on parallax, and is drifting further away with a radial velocity of +27 km/s.[1] 56 Ceti is an aging giant star with a stellar classification of K3III,[3] having exhausted the supply of hydrogen at its core and expanded to 39[1] times the Sun's radius. It is radiating 391[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,099 K.[1]

  1. ^ a b c d e f g h i j k l m 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 McWilliam1990 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1988 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference EgUBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference note was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference uranographia was invoked but never defined (see the help page).