HD 33463 is a suspected variable star in the northern constellation of Auriga, about 1,050 light years away. It is a red giant star with a stellar classification of M2III, and has expanded away from the main sequence after exhausting its core hydrogen. It has reached 133 times the size of the Sun and, at an effective temperature of 3,753 K it shines at a bolometric luminosity of 2,114 L☉.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 11m 38.31132s[2] |
| Declination | +29° 54′ 12.8293″[2] |
| Apparent magnitude (V) | 6.4419±0.0027[3] |
| Characteristics | |
| Evolutionary stage | red giant[3] |
| Spectral type | M2III[4] |
| B−V color index | +1.78[5] |
| Variable type | Suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | 10.64±0.22 km/s |
| Proper motion (μ) | RA: +7.895[2] mas/yr Dec.: −21.036[2] mas/yr |
| Parallax (π) | 3.1107 ± 0.1553 mas[2] |
| Distance | 1,050 ± 50 ly (320 ± 20 pc) |
| Absolute magnitude (MV) | −1.07[4] |
| Details | |
| Mass | 1.3[7] M☉ |
| Radius | 133[8] R☉ |
| Luminosity | 2,114[9] L☉ |
| Surface gravity (log g) | 0.37[7] cgs |
| Temperature | 3,753[8] K |
| Metallicity [Fe/H] | −0.32[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Hipparcos satellite data showed possible variations in the apparent magnitude of HD 33463 and it was given the suspected variable star designation NSV 16257.[6] Observations with MASCARA, a camera designed to detect exoplanets, show brightness variations with a maximum amplitude of 21 thousandths of a magnitude and a period slightly less than a day.[1]
References
edit- ^ a b Burggraaff, O.; Talens, G. J. J.; Spronck, J.; Lesage, A. L.; Stuik, R.; Otten, G. P. P. L.; Van Eylen, V.; Pollacco, D.; Snellen, I. A. G. (September 2018). "Studying bright variable stars with the Multi-site All-Sky CAmeRA (MASCARA)". Astronomy and Astrophysics. 617: A32. arXiv:1806.02247. Bibcode:2018A&A...617A..32B. doi:10.1051/0004-6361/201833142.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Famaey, B.; et al. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- ^ a b 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. S2CID 119257644.
- ^ Neckel, H. (1974). "Photoelectric catalogue of 1030 BD M-type stars located along the galactic equator". Astronomy and Astrophysics Supplement. 18: 169. Bibcode:1974A&AS...18..169N.
- ^ a b Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
- ^ a b c Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.