Mu1 Cancri
Mu1 Cancri, Latinized from μ1 Cancri, is an evolved red giant star in the zodiac constellation of Cancer. Parallax measurements made by the Hipparcos spacecraft put it about 740 light years (230 parsecs) from the Sun.[1] At that distance, the visual magnitude is diminished by an extinction factor of 0.28.[8] The name Mu1 comes from the Bayer naming system: the "1" in the name is because (from Earth) it appears to be close to 10 Cancri (Mu2 Cancri). Mu1 Cancri is a variable star and was given the variable star designation BL Cancri. It is a slow irregular variable[3] with periods of 22.6, 37.8, and 203.7 days.[9]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Cancer |
Right ascension | 08h 06m 18.39576s[1] |
Declination | +22° 38′ 07.7621″[1] |
Apparent magnitude (V) | +5.99[2] |
Characteristics | |
Spectral type | M3 III[3] |
B−V color index | +1.66[2] |
Variable type | Lb[3] |
Astrometry | |
Radial velocity (Rv) | +29.61±0.57[4] km/s |
Proper motion (μ) | RA: −5.97[1] mas/yr Dec.: −9.06[1] mas/yr |
Parallax (π) | 4.38 ± 0.53[1] mas |
Distance | approx. 740 ly (approx. 230 pc) |
Absolute magnitude (MV) | −0.79[5] |
Details | |
Luminosity | 1,141[6] L☉ |
Temperature | 3,611[6] K |
Other designations | |
Database references | |
SIMBAD | data |
References
- 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.
- Ducati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues, 2237, Bibcode:2002yCat.2237....0D.
- Lebzelter, T.; Hron, J. (December 2003), "Technetium and the third dredge up in AGB stars. I. Field stars", Astronomy and Astrophysics, 411: 5335–42, arXiv:astro-ph/0310018, Bibcode:2003A&A...411..533L, doi:10.1051/0004-6361:20031458.
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
- Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
- "mu.01 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-17.
- Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272.
- Tabur, V.; Bedding, T. R. (2009), "Long-term photometry and periods for 261 nearby pulsating M giants", Monthly Notices of the Royal Astronomical Society, 400 (4): 1945–61, arXiv:0908.3228, Bibcode:2009MNRAS.400.1945T, doi:10.1111/j.1365-2966.2009.15588.x.
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