RU Camelopardalis

RU Camelopardalis

A visual band light curve for RU Camelopardalis, adapted from Kollath and Szeidl (1993)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 07h 21m 44.11647s[2]
Declination +69° 40′ 14.7192″[2]
Apparent magnitude (V) 8.10 - 9.79[3]
Characteristics
Spectral type C0,1-C3,2e(K0-R0)[3]
U−B color index +0.97 - +1.17[4] (+0.9 - +1.3[5])
B−V color index +1.09 - +1.16[4] (+1.0 - +1.4[5])
Variable type W Vir[3]
Astrometry
Radial velocity (Rv)21.20[6] km/s
Proper motion (μ) RA: 0.24[2] mas/yr
Dec.: −2.10[2] mas/yr
Parallax (π)0.71 ± 0.80 mas[2]
Absolute magnitude (MV)−2.4[7]
Details
Mass0.57[8] M☉
Luminosity417[8] L☉
Surface gravity (log g)1.44[7] cgs
Temperature5,250[7] K
Metallicity [Fe/H]−0.37[7] dex
Other designations
RU Cam, BD+69°417, HD 56167, HIP 35681, SAO 14157, 2MASS J07214412+6940147, AAVSO 0710+69
Database references
SIMBADdata

RU Camelopardalis, or RU Cam, is a W Virginis variable (type II Cepheid) in the constellation of Camelopardalis. It is also a Carbon star, which is very unusual for a Cepheid variable.

  1. ^ Cite error: The named reference Kollath was invoked but never defined (see the help page).
  2. ^ a b c d e Van Leeuwen, F. (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. S2CID 18759600.
  3. ^ a b c Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-Line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  4. ^ a b Berdnikov, L. N. (2008). "VizieR Online Data Catalog: Photoelectric observations of Cepheids in UBV(RI)c (Berdnikov, 2008)". VizieR On-Line Data Catalog: II/285. Originally Published in: 2008yCat.2285....0B. 2285. Bibcode:2008yCat.2285....0B.
  5. ^ a b Cite error: The named reference smak was invoked but never defined (see the help page).
  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. ^ a b c d Kipper, Tõnu; Klochkova, Valentina G. (2007). "Optical Spectroscopy of RU Cam, a Pulsating Carbon Star". Baltic Astronomy. 16: 383. arXiv:0706.2969. Bibcode:2007BaltA..16..383K.
  8. ^ a b Bergeat, J.; Knapik, A.; Rutily, B. (2002). "Carbon-rich giants in the HR diagram and their luminosity function". Astronomy and Astrophysics. 390 (3): 967. Bibcode:2002A&A...390..967B. doi:10.1051/0004-6361:20020525.