1 Ceti

1 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 23h 58m 21.22532s[1]
Declination –15° 50′ 50.9421″[1]
Apparent magnitude (V) +6.276[2]
Characteristics
Spectral type K1III CNII[3]
U−B color index +1.03[4]
B−V color index +1.08[4]
Astrometry
Radial velocity (Rv)4.3±2[5] km/s
Proper motion (μ) RA: +82.668[1] mas/yr
Dec.: –7.878[1] mas/yr
Parallax (π)6.0976 ± 0.0711 mas[1]
Distance535 ± 6 ly
(164 ± 2 pc)
Absolute magnitude (MV)–0.10[6]
Details
Radius28[7] R☉
Luminosity143.53[6] L☉
Other designations
1 Cet, BD−16°6394, FK5 3925, GC 33242, HD 224481, HIP 118178, HR 9065, SAO 165972[8]
Database references
SIMBADdata

1 Ceti is a star in the constellation of Cetus. With an apparent magnitude of about 6.2,[2] the star is barely visible to the naked eye (see Bortle scale). Parallax estimates put it at a distance of about 535 light-years (164 parsecs) away from the Earth. It is moving further from the Sun with a heliocentric radial velocity of 4 km/s.[5]

This star has a spectral type of K1III,[3] implying a K-type giant. These types of stars are generally reddish-colored stars with spectral types from K to M, with radii that are 10 to 100 times larger than the Sun.[9] The "CNII" in its spectral type indicates strong cyanogen signature in its outer atmosphere.[10][11] The star is radiating 144[6] times the Sun's luminosity from its enlarged photosphere.

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference TYC2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference HD was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference UBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference GCRV was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference CADARS 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 dd was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Keenan1987 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Janes1971 was invoked but never defined (see the help page).