Astronomy:AR Cephei
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Short description: Variable star in the constellation Cepheus
250px AR Cephei, as seen during the Digitized Sky Survey | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 51m 33.86137s[1] |
| Declination | +85° 02′ 46.9418″[1] |
| Apparent magnitude (V) | 6.9 - 8.3[2] |
| Characteristics | |
| Spectral type | M4 III[3] |
| B−V color index | +1.52[4] |
| Variable type | SRb[2] |
| Astrometry | |
| Radial velocity (Rv) | −15.66±0.23[1] km/s |
| Proper motion (μ) | RA: 26.580[1] mas/yr Dec.: 4.143[1] mas/yr |
| Parallax (π) | 3.2317 ± 0.0967[1] mas |
| Distance | 1,010 ± 30 ly (309 ± 9 pc) |
| Details | |
| Mass | 2.8[5] M☉ |
| Radius | 123[1] R☉ |
| Luminosity | 2,094[1] L☉ |
| Surface gravity (log g) | 1.49[5] cgs |
| Temperature | 2,400 - 3,700[citation needed] K |
| Metallicity [Fe/H] | −0.39[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
AR Cephei (AR Cep) is a variable star in the constellation Cepheus. It is classified as a semiregular star[7][8] with a spectral type of M4III.[3]
Aernout de Sitter discovered the star in 1933.[3][9] It was given its variable star designation, AR Cephei, in 1939.[9]
AR Cephei is located approximately 1,010 light-years (309 parsecs) from the Solar System, and has a radial velocity of -16 km/s, meaning that it is moving toward the Sun at ~16 kilometers every second.[1]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
- ↑ 3.0 3.1 3.2 Kucinskas, Arunas (1990). "Változócsillagok. A AR Cephei statisztikai analízise" (in Hungarian). Meteor 20: 31–33. https://www.epa.hu/03000/03054/00156/pdf/EPA03054_meteor_1990_03_031-033.pdf.
- ↑ Oja, T. (1984). "UBV photometry of stars whose positions are accurately known". Astronomy and Astrophysics Supplement Series 57: 357. Bibcode: 1984A&AS...57..357O.
- ↑ 5.0 5.1 5.2 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ "V* AR Cep". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+AR+Cep.
- ↑ Kučinskas, Arūnas (1990). "Statistical Analysis of the Semiregular Variable AR Cephei". The Journal of the American Association of Variable Star Observers 19 (1): 73–75. Bibcode: 1990JAVSO..19...73K.
- ↑ "obj-Cep". https://britastro.org/vss/obj-cep.html.
- ↑ 9.0 9.1 Guthnick, P.; Schneller, H. (1939). "Benennung von veränderlichen Sternen". Astronomische Nachrichten 268 (11–12): 165. doi:10.1002/asna.19392681102. Bibcode: 1939AN....268..165G.
- ↑ "ASAS-SN Variable Stars Database". ASAS-SN. https://asas-sn.osu.edu/variables/lookup.
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