Rho1 Arietis

Rho¹ Arietis
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Aries
Right ascension	02h 54m 55.19994s
Declination	+17° 44′ 05.1102″
Apparent magnitude (V)	7.01
Characteristics
Spectral type	A5 V
U−B color index	+0.03
B−V color index	+0.28
Astrometry
Radial velocity (Rv)	+3.2 ± 3.6 km/s
Proper motion (μ)	RA: +46.18 mas/yr ; Dec.: −25.50 mas/yr
Parallax (π)	12.07 ± 0.70 mas
Distance	270 ± 20 ly ; (83 ± 5 pc)
Absolute magnitude (MV)	+2.43
Details
Luminosity	8.85 L☉
Other designations
	Rho1 Ari, 44 Arietis, BD+17°454, GC 3492, HD 18091, HIP 13579, SAO 93178.
Database references
SIMBAD	data

Rho¹ Arietis is the Bayer designation for a star in the northern constellation of Aries, the ram. It has an apparent visual magnitude of 7.01,^[2] making it a challenge to see with the naked eye even under ideal dark-sky conditions. Based upon an annual parallax shift measurement of 12.07 mas,^[1] it is 270 light-years (83 parsecs) distant from the Earth. It is a white-hued A5 main sequence star.

References

^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (November 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, S2CID 18759600.
^ ^a ^b ^c Gontcharov, G. A. (November 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, S2CID 119231169.
^ Andersson, B.-G.; Idzi, R.; Uomoto, Alan; Wannier, P. G.; Chen, B.; Jorgensen, A. M. (2002). "A Spectroscopic and Photometric Survey of Stars in the Field of L1457: A New Distance Determination". The Astronomical Journal. 124 (4): 2164. Bibcode:2002AJ....124.2164A. doi:10.1086/342541.
^ ^a ^b Oja, T. (1987). "UBV photometry of stars whose positions are accurately known". Astronomy and Astrophysics Supplement Series. 71: 561. Bibcode:1987A&AS...71..561O.
^ ^a ^b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ "44 Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-08.

External links

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[aaa474_2_653-1] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (November 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, S2CID 18759600.

[al32_11_759-2] Gontcharov, G. A. (November 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, S2CID 119231169.

[andersson-3] Andersson, B.-G.; Idzi, R.; Uomoto, Alan; Wannier, P. G.; Chen, B.; Jorgensen, A. M. (2002). "A Spectroscopic and Photometric Survey of Stars in the Field of L1457: A New Distance Determination". The Astronomical Journal. 124 (4): 2164. Bibcode:2002AJ....124.2164A. doi:10.1086/342541.

[ubv-4] Oja, T. (1987). "UBV photometry of stars whose positions are accurately known". Astronomy and Astrophysics Supplement Series. 71: 561. Bibcode:1987A&AS...71..561O.

[Anderson2012-5] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.

[SIMBAD-6] "44 Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-08.

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Aries
Right ascension	02^h 54^m 55.19994^s^[1]
Declination	+17° 44′ 05.1102″^[1]
Apparent magnitude (V)	7.01^[2]
Characteristics
Spectral type	A5 V^[3]
U−B color index	+0.03^[4]
B−V color index	+0.28^[4]
Astrometry

Radial velocity (R_v)	+3.2 ± 3.6^[2] km/s
Proper motion (μ)	RA: +46.18^[1] mas/yr Dec.: −25.50^[1] mas/yr
Parallax (π)	12.07 ± 0.70 mas^[1]
Distance	270 ± 20 ly (83 ± 5 pc)
Absolute magnitude (M_V)	+2.43^[5]

Details

Luminosity	8.85^[5] `L`_☉

Other designations
Rho¹ Ari, 44 Arietis, BD+17°454, GC 3492, HD 18091, HIP 13579, SAO 93178.^[6]
Database references
SIMBAD	data