56 Ceti

56 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 56m 40.19863s[1]
Declination −22° 31′ 36.4252″[1]
Apparent magnitude (V) 4.87[2]
Characteristics
Spectral type K3III[3]
U−B color index +1.67[2]
B−V color index +1.43[2]
Astrometry
Radial velocity (Rv)26.70 ± 0.8[4] km/s
Proper motion (μ) RA: 63.33[1] mas/yr
Dec.: -30.10[1] mas/yr
Parallax (π)9.24 ± 0.39[1] mas
Distance350 ± 10 ly
(108 ± 5 pc)
Other designations
CD−23° 721, HD 11930, HIP 9061, HR 565, SAO 167416
Database references
SIMBADdata

56 Ceti is a star located in the constellation Cetus. Not found in the original Bayer catalogue, it was given the Bayer-like designation Upsilon1 Ceti by Flamsteed[note 1] to distinguish it from Bayer's Upsilon Ceti (which Flamsteed designated Upsilon2 or 59 Ceti). Bode included this designation in his Uranographia, but the superscripted designations Upsilon1 and Upsilon2 are not in general use today. 56 Ceti is also known as HD 11930.

References

  1. 1 2 3 4 5 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
  3. ↑ Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 4. Bibcode:1988mcts.book.....H.
  4. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.

Notes

  1. ↑ See 56 Ceti in Lalande's recension of Flamsteed's catalog: Lalande, Jérôme (1783). Éphémérides des mouvemens célestes. p. 153.


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