69 Ceti
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h21m56.62838s[1] |
| Declination | +00° 23′ 44.4288″[1] |
| Apparent magnitude(V) | 5.287[2] |
| Characteristics | |
| Spectral type | M1/2III[3] |
| U−Bcolor index | +1.85[4] |
| B−Vcolor 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 ± 0.2323mas[1] |
| Distance | 860 ± 50ly (260 ± 20pc) |
| Absolute magnitude(MV) | –2.73[5] |
| Details | |
| Radius | 100+10 −18[1]R☉ |
| Luminosity | 1,813±126[1]L☉ |
| Temperature | 3,765+392 −177[1]K |
| Other designations | |
| Database references | |
| SIMBAD | data |
69 Cetiis a single[7]starlocated around 860[1]light yearsaway in theequatorialconstellationofCetus.It is visible to the naked eye with anapparent visual magnitudeof 5.3.[2]This is an agingred giantstar with astellar classificationof M1/2III.[3]It is radiating 1,813 times theSun's luminosityfrom an enlargedphotosphere,100 times theSun's radius,at aneffective temperatureof 3,765 K.[1]
References
[edit]- ^abcdefghijkBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData Release 2: Summary of the contents and survey properties ".Astronomy & Astrophysics.616.A1.arXiv:1804.09365.Bibcode:2018A&A...616A...1G.doi:10.1051/0004-6361/201833051.Gaia DR2 record for this sourceatVizieR.
- ^abHøg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".Astronomy and Astrophysics.355:L27.Bibcode:2000A&A...355L..27H.doi:10.1888/0333750888/2862.
- ^abHouk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars".Michigan Spectral Survey.5.Bibcode:1999MSS...C05....0H.
- ^abJohnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars".Communications of the Lunar and Planetary Laboratory.4:99.Bibcode:1966CoLPL...4...99J.
- ^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.arXiv:0907.3346.Bibcode:2009PASP..121..842R.doi:10.1086/605456.S2CID17821279.
- ^"69 Cet".SIMBAD.Centre de données astronomiques de Strasbourg.RetrievedDecember 28,2018.
- ^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,arXiv:0806.2878,Bibcode:2008MNRAS.389..869E,doi:10.1111/j.1365-2966.2008.13596.x,S2CID14878976.
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