4 Arietis

4 Arietis
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Aries
Right ascension	01^h 48^m 10.93603^s^[1]
Declination	+16° 57′ 19.9768″^[1]
Apparent magnitude (V)	5.86^[2]
Distance	275 ± 6 ly (84 ± 2^[1] pc)
Spectral type	B9.5 V^[3]
Other designations
BD+16° 203, FK5 1050, HD 10982, HIP 8387, HR 522, SAO 92637.^[4]

4 Arietis (abbreviated 4 Ari) is a star in the northern constellation of Aries, the ram. 4 Arietis is the Flamsteed designation. Its apparent magnitude is 5.86. It has an annual parallax shift of 11.85 ± 0.25 mas,^[1] which corresponds to a distance from Earth of 275 light-years (84 parsecs). It has an apparent visual magnitude of 5.86,^[2] making it visible to the naked eye from dark suburban skies. This is a B-type main sequence star with a stellar classification of B9.5 V.^[3] It has around 2.5 times the mass of the Sun and shines with 40 times the Sun's luminosity.^[5]

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 Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode:1983A&AS...52..131O.
1 2 Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
↑ "4 Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 1 August 2012.
↑ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.

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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