45 Eridani

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45 Eridani
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus
Right ascension 04h 31m 52.667s[1]
Declination −00° 02′ 38.44″[1]
Apparent magnitude (V) 4.896[1]
Characteristics
Spectral type K0/1III[2]
U−B color index +1.41[3]
B−V color index +1.33[3]
Astrometry
Radial velocity (Rv) 16.30 ± 0.8[4] km/s
Proper motion (μ) RA: -1.85[5] mas/yr
Dec.: -8.19[5] mas/yr
Parallax (π) 4.97 ± 0.38[5] mas
Distance 660 ± 50 ly
(200 ± 20 pc)
Other designations
BD−00° 713, HD 28749, HIP 21139, HR 1437, SAO 131270
Database references
SIMBAD data

45 Eridani (45 Eri) is a star in the constellation Eridanus. Its apparent magnitude is 4.896.[1]

References[edit]

  1. ^ a b c d Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. 
  2. ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H. 
  3. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  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. Bibcode:2006AstL...32..759G. arXiv:1606.08053Freely accessible. doi:10.1134/S1063773706110065. 
  5. ^ a b c van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.