- Rho² Arietis
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- For other star systems with this Bayer designation, see Rho Arietis.
ρ2 Arietis Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS)Constellation Aries Right ascension 02h 55m 48.4978s[1] Declination +18° 19′ 53.903″[1] Apparent magnitude (V) 5.62–6.01[2] Characteristics Spectral type M6III[1] U−B color index 1.12[3] B−V color index 1.47[3] R−I color index 2.17[3] Variable type SRB[2] Astrometry Radial velocity (Rv) 46.0[1] km/s Proper motion (μ) RA: −8.08[1] mas/yr
Dec.: −14.91[1] mas/yrParallax (π) 8.08 ± 0.89[1] mas Distance approx. 400 ly
(approx. 120 pc)Details Temperature 3442 ± 148[4] K Database references SIMBAD data Other designations 45 Arietis, RZ Arietis, AAVSO 0250+17, BD+17°457, DO 9631, GC 3517, HD 18191, HIP 13654, HR 867, PPM 118672, SAO 93189.[1]Rho2 Arietis is a M-type red giant with an apparent magnitude which varies between 5.62 and 6.01.[2] It is approximately 400 light years from Earth.[1] It is classified as a semiregular variable star and its brightness varies with a period of 30 days. It is also known by its variable star designation, RZ Arietis.[2]
References
- ^ a b c d e f g h i V* RZ Ari -- Variable Star, database entry, SIMBAD. Accessed on line July 30, 2008.
- ^ a b c d V* RZ Ari, entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250.
- ^ a b c HR 867, entry, Bright Star Catalogue, 5th Revised Ed., D. Hoffleit and W. H. Warren, Jr., 1991, CDS ID V/50.
- ^ Table 2, Radii and effective temperatures for K and M giants and supergiants. II, H. M. Dyck, G. T. van Belle, and R. R. Thompson, The Astronomical Journal 116 (August 1998), pp. 981–986, Bibcode: 1998AJ....116..981V, doi:10.1086/300453.
External links
Coordinates:
02h 55m 48.4978s, +18° 19′ 53.903″Bayer Flamsteed - 1
- 4
- 5 (γ, Mesarthim)
- 6 (β, Sheratan)
- 7
- 8 (ι)
- 9 (λ)
- 10
- 11
- 12 (κ)
- 13 (α, Hamal)
- 14
- 15
- 16
- 17 (η)
- 19
- 20
- 21
- 22 (θ)
- 23
- 24 (ξ)
- 26
- 27
- 29
- 30
- 31
- 32 (ν)
- 33
- 34 (μ)
- 35
- 36
- 37 (ο)
- 38
- 39
- 40
- 41 (c, Bharani)
- 42 (π)
- 43 (σ)
- 44 (ρ¹)
- 45 (ρ²)
- 46 (ρ³)
- 47
- 48 (ε)
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57 (δ, Botein)
- 58 (ζ)
- 59
- 60
- 61 (τ¹)
- 62
- 63 (τ²)
- 64
- 65
- 66
- 54 Cet
- 85 Cet
Nearby - Teegarden's star
- TZ
- Gliese 109
- GJ 3146
Categories:- Star stubs
- Flamsteed objects
- Bayer objects
- HIP objects
- Henry Draper Catalogue objects
- M-type giants
- Aries constellation
- Semiregular variables
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