Rho³ Arietis

Rho³ Arietis (Rho³ Ari, ρ³ Arietis, ρ³ Ari) is the Bayer designation for a star in the northern constellation of Aries. It is faintly visible to the naked eye with an apparent visual magnitude of 5.63.[2] Based upon an annual parallax shift of 28.29 mas,[1] this star is located at a distance of approximately 115 light-years (35 parsecs) from Earth.

For other stars with this Bayer designation, see ρ Arietis.

Rho³ Arietis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Aries
Right ascension	02^h 56^m 26.1549^s[1]
Declination	+18° 01′ 23.2277″[1]
Apparent magnitude (V)	5.63[2]
Characteristics
Spectral type	F6 V[3]
U−B color index	−0.02[2]
B−V color index	+0.44[2]
V−R color index	0.3[2]
R−I color index	0.2[2]
Astrometry
Radial velocity (Rv)	+10.5[4] km/s
Proper motion (μ)	RA: +281.75[1] mas/yr Dec.: −218.90[1] mas/yr
Parallax (π)	28.29 ± 0.43[1] mas
Distance	115 ± 2 ly (35.3 ± 0.5 pc)
Absolute magnitude (MV)	2.89[4]
Details
Surface gravity (log g)	4.19[5] cgs
Temperature	6,380[5] K
Metallicity [Fe/H]	0.23[5] dex
Rotational velocity (v sin i)	15[6] km/s
Age	2.4[4] Gyr
Other designations
ρ^3 Ari, Rho^3 Arietis, Rho^3 Ari, 46 Arietis, 46 Ari, BD+17 458, FK5 2204, GC 3532, HD 18256, HIP 13702, HR 869, LTT 10961, NLTT 9363, PPM 118684, SAO 93195.[2]
Database references
SIMBAD	data

This is an astrometric binary system.[7] The visible component is an F-type main sequence star with a stellar classification of F6 V.[3] It is around 2.4 billion years old[4] and has a high abundance of elements other than hydrogen and helium when compared to the Sun.[5]

Name

This star, along with δ Ari, ε Ari, ζ Ari, and π Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of Al Baṭn, the Belly.[8] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Buṭain were the title for five stars : δ Ari as Botein, π Ari as Al Buṭain I, ρ³ Ari as Al Buṭain II, ε Ari as Al Buṭain III dan ζ Ari as Al Buṭain IV[9]

References

1. 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.
2. "rho Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-09.
3. Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117.
4. Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191
5. Balachandran, Suchitra (May 1, 1990), "Lithium depletion and rotation in main-sequence stars", Astrophysical Journal, Part 1, 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.
6. Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1), Bibcode:1970CoAsi.239....1B.
7. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
8. Allen, R. H. (1963), Star Names: Their Lore and Meaning (Reprint ed.), New York, NY: Dover Publications Inc, p. 83, ISBN 0-486-21079-0, retrieved 2010-12-12.
9. Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971

External links

• HR 869 in the Bright Star Catalogue
• Image Rho³ Arietis