54 Eridani

54 Eridani
Observation data; Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	04h 40m 26.51204s
Declination	−19° 40′ 17.3697″
Apparent magnitude (V)	4.30
Characteristics
Spectral type	M3/4III
U−B color index	+1.80
B−V color index	+1.59
Variable type	LPV
Astrometry
Radial velocity (Rv)	-32.90 ± 0.8 km/s
Proper motion (μ)	RA: 29.13 mas/yr ; Dec.: -96.42 mas/yr
Parallax (π)	8.85 ± 0.60 mas
Distance	370 ± 20 ly ; (113 ± 8 pc)
Other designations
	DM Eri, BD−19° 988, HD 29755, HIP 21763, HR 1496, SAO 149818
Database references
SIMBAD	data

54 Eridani (54 Eri) is a star in the constellation Eridanus. Its apparent magnitude is 4.30.^[2] It is a long-period variable star.^[5]

References

^ ^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:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
^ ^a ^b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
^ 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.
^ ^a ^b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. {{cite journal}}: Cite journal requires |journal= (help)
^ ^a ^b ^c "* 54 Eri". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 August 2017.
^ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.

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Observation data Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	04^h 40^m 26.51204^s^[1]
Declination	−19° 40′ 17.3697″^[1]
Apparent magnitude (V)	4.30^[2]
Characteristics
Spectral type	M3/4III^[3]
U−B color index	+1.80^[4]
B−V color index	+1.59^[4]
Variable type	LPV^[5]
Astrometry

Radial velocity (R_v)	-32.90 ± 0.8^[6] km/s
Proper motion (μ)	RA: 29.13^[1] mas/yr Dec.: -96.42^[1] mas/yr
Parallax (π)	8.85 ± 0.60 mas^[1]
Distance	370 ± 20 ly (113 ± 8 pc)

Other designations
DM Eri, BD−19° 988, HD 29755, HIP 21763, HR 1496, SAO 149818^[5]
Database references
SIMBAD	data