20 Ceti

20 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 00h 53m 00.49452s[1]
Declination −01° 08′ 39.3317″[1]
Apparent magnitude (V) 4.76[2]
Characteristics
Spectral type K5 III[3]
U−B color index +1.91[4]
B−V color index +1.56[4]
Astrometry
Radial velocity (Rv)+16.22±0.28[5] km/s
Proper motion (μ) RA: +6.99[1] mas/yr
Dec.: −15.66[1] mas/yr
Parallax (π)5.56 ± 0.22 mas[1]
Distance590 ± 20 ly
(180 ± 7 pc)
Absolute magnitude (MV)−1.58[6]
Details[7]
Radius65.93+2.13
−2.25 R☉
Luminosity754.8±52.6 L☉
Surface gravity (log g)1.63 cgs
Temperature3,724±35 K
Other designations
BD−01° 114, FK5 1022, HD 5112, HIP 4147, HR 248, SAO 129009[8]
Database references
SIMBADdata

20 Ceti is a single[9] star located around 590[1] light years away in the equatorial constellation of Cetus. It is faintly visible to the naked eye with apparent magnitude is 4.76.[2] The Bright Star Catalogue has this star classified as M0III,[10] matching an aging red giant star that has consumed the hydrogen at its core and expanded. Houk and Swift (1999) listed an earlier class of K5 III.[3] It has around 60 times the Sun's radius and is radiating about 800 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,700 K.[7]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Ducati was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference EgUBV was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Famaey2009 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Groenewegen2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Baines was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).