56 Ceti

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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
Distance 350 ± 10 ly
(108 ± 5 pc)
Other designations
CD−23° 721, HD 11930, HIP 9061, HR 565, SAO 167416
Database references
SIMBAD data

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,[citation needed] but the superscripted designations Upsilon1 and Upsilon2 are not in general use today. 56 Ceti is also known as HD 11930.

References[edit]

  1. ^ a b c d e van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c 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 "Compilation of Eggen's UBV data, transformed to UBV (unpublished)".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:1606.08053Freely accessible. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 

Notes[edit]

  1. ^ See 56 Ceti in Lalande's recension of Flamsteed's catalog: Lalande, Jérôme (1783). "Éphémérides des mouvemens célestes". Google Books. Retrieved 14 Feb 2017.