Omicron Arietis

Omicron Arietis
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Aries
Right ascension	02^h 44^m 32.97317^s^[1]
Declination	+15° 18′ 42.7085″^[1]
Apparent magnitude (V)	+5.78^[2]
Distance	594 ± 35 ly (182 ± 11^[1] pc)
Spectral type	B9 Vn^[3]
Other designations
37 Arietis, BD+14 457, HD 17036, HIP 12803, HR 809, SAO 93082.^[2]

Omicron Arietis (ο Ari, ο Arietis) is the Bayer designation for a star in the northern constellation of Aries. Based upon an annual parallax shift of 5.49 ± 0.32 mas,^[1] it is 594 ± 35 light-years (182 ± 11 parsecs) distant from Earth. This star has an apparent visual magnitude of +5.78,^[2] which means it is dimly visible to the naked eye.

This is a B-type main sequence star with a stellar classification of B9 Vn.^[3] The 'n' suffix indicates that it has nebulous absorption lines in its spectrum, which are caused by the Doppler effect and rapid rotation. Indeed, it has a projected rotational velocity of 225 km/s.^[4]

References

1 2 3 4 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
1 2 3 "omi Ari -- Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-08
1 2 Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348.
↑ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.

Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ¹ ρ² ρ³ σ τ¹ τ²

Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 40 41 (Bharani) 47 49 50 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet

Variable	R X RV RW RX SS TT UX VW VY VZ (16 Tri) WX XY

HR	577 578 601 609 624 644 676 711 723 728 803 856 902 916 924 931 945 946 948 952 971 999

HD	12661 19445 19549 20367

Other	BD +20°307 HAT-P-25 HIP 14810 L 1159-16 L1448 IRS 3 L1455 FIR LkHα 264 PSR B0301+19 Teegarden's star WASP-11

Star-forming	L1448 L1455 MBM 12

NGC	671 673 675 677 678 680 683 691 694 695 697 711 716 719 722 765 770 772 774 776 781 786 792 794 803 810 817 820 821 870 871 876 877 882 900 901 903 904 915 916 918 919 924 927 928 932 935 938 962 972 976 984 990 992 1012 1024 1028 1029 1030 1036 1054 1056 1088 1109 1111 1112 1115 1116 1117N 1117S 1127 1134 1156 1166 1168 1236

Other	AO 0235+164 3C 79 CTA 21 1ES 0229+200 IC 1801 IC 1854 PKS 0201+113 PKS 0202+149 QSO J0237+2848 RBS 0413 Segue 2 UGC 2140

Other

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