3 Ceti

3 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 00h 04m 30.11827s[1]
Declination −10° 30′ 34.2849″[1]
Apparent magnitude (V) 4.953[2]
Characteristics
Spectral type K3 III[3] or K3 Ib[4]
B−V color index +1.66[2]
Astrometry
Radial velocity (Rv)−42.10±0.33[5] km/s
Proper motion (μ) RA: −6.85[1] mas/yr
Dec.: −12.02[1] mas/yr
Parallax (π)1.56 ± 0.31 mas[1]
Distanceapprox. 2,100 ly
(approx. 600 pc)
Details
Mass9.0±0.6[6] M☉
Radius182[7] R☉
Luminosity (bolometric)7,877[7] L☉
Surface gravity (log g)0.90[8] cgs
Temperature4,152[8] K
Metallicity [Fe/H]0.08[8] dex
Rotational velocity (v sin i)5.8±1.0[9] km/s
Age29.7±3.6[6] Myr
Other designations
3 Cet, NSV 13, BD−11°6194, FK5 2001, HD 225212, HIP 355, HR 9103, SAO 147066, 2MASS J00043012-1030344[10]
Database references
SIMBADdata

3 Ceti is a single,[11] orange-hued star located around 2,100 light years away[12] in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent visual magnitude of 4.95.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −42 km/s.[5] It has a peculiar velocity of 60.7+3.8
−6.2 km/s and is a candidate runaway star.[6]

This is a red supergiant star with a stellar classification of K3 Ib,[4] although Houk and Swift (1999) classed it as a normal giant at K3 III.[3] It displays microvariability, undergoing changes in brightness with a frequency of 11.2 times per day and an amplitude of 0.0053 in magnitude.[4] The star is about 30 million years old with nine times the mass of the Sun[6] and 182 times the radius of the Sun. It is radiating 7,877[7] times the Sun's luminosity from its photosphere at an effective temperature of 4,152 K.[8]

It is a possible supernova candidate.[12]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference mk was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference koen2002 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference rsg was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference luck2014 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference DeMedeiros2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ a b Asakura, K.; Gando, A.; Gando, Y.; Hachiya, T.; Hayashida, S.; Ikeda, H.; Inoue, K.; Ishidoshiro, K.; Ishikawa, T. (2015-06-03). "KamLAND SENSITIVITY TO NEUTRINOS FROM PRE-SUPERNOVA STARS". The Astrophysical Journal. 818: 91. arXiv:1506.01175v4. doi:10.3847/0004-637X/818/1/91.