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69 Ceti

Topic: Astronomy

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Short description: Star in the constellation Cetus
69 Ceti
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cetus
Right ascension  02h 21m 56.62838s[1]
Declination +00° 23′ 44.4288″[1]
Apparent magnitude (V) 5.287[2]
Characteristics
Spectral type M1/2III[3]
U−B color index +1.85[4]
B−V color index +1.65[4]
Astrometry
Radial velocity (Rv)+26.99±0.32[1] km/s
Proper motion (μ) RA: −12.393[1] mas/yr
Dec.: −8.059[1] mas/yr
Parallax (π)3.7821 ± 0.2323[1] mas
Distance860 ± 50 ly
(260 ± 20 pc)
Absolute magnitude (MV)–2.73[5]
Details
Radius100+10
−18[1] R☉
Luminosity1,813±126[1] L☉
Temperature3,765+392
−177[1] K
Other designations
69 Cet, BD−00°355, HD 14652, HIP 11021, HR 689, SAO 110495[6]
Database references
SIMBADdata

69 Ceti is a single[7] star located around 860[1] light years away in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent visual magnitude of 5.3.[2] This is an aging red giant star with a stellar classification of M1/2III.[3] It is radiating 1,813 times the Sun's luminosity from an enlarged photosphere, 100 times the Sun's radius, at an effective temperature of 3,765 K.[1]

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. doi:10.1888/0333750888/2862. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey 5. Bibcode: 1999MSS...C05....0H. 
  4. ↑ 4.0 4.1 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99. Bibcode: 1966CoLPL...4...99J. 
  5. ↑ Ryon, Jenna; Shetrone, Matthew D.; Smith, Graeme H. (2009). "Comparing the CaiiH and K Emission Lines in Red Giant Stars". Publications of the Astronomical Society of the Pacific 121 (882): 842. doi:10.1086/605456. Bibcode: 2009PASP..121..842R. 
  6. ↑ "69 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=69+Cet. 
  7. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 



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