HD 12467 is a single[11] star in the northern circumpolar constellation of Cepheus. It has a white hue and is barely visible to the naked eye with an apparent visual magnitude of 6.05.[2] The distance to this object is 231 light years based on parallax,[1] but it is drifting closer with a heliocentric radial velocity of −9 km/s.[5]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 2h 9m 25.30805s[1] |
| Declination | +81° 17′ 45.3964″[1] |
| Apparent magnitude (V) | 6.05[2] |
| Characteristics | |
| Spectral type | A1.5V[3] |
| U−B color index | 0.06[4] |
| B−V color index | 0.11[4] |
| Astrometry | |
| Radial velocity (Rv) | −9.0±3.0[5] km/s |
| Proper motion (μ) | RA: −34.605[1] mas/yr Dec.: 6.674[1] mas/yr |
| Parallax (π) | 14.1120 ± 0.0500 mas[1] |
| Distance | 231.1 ± 0.8 ly (70.9 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.81[6] |
| Details | |
| Mass | 1.81[7] M☉ |
| Radius | 1.92[8] R☉ |
| Luminosity | 16[6] L☉ |
| Surface gravity (log g) | 4.30[7] cgs |
| Temperature | 8,528[7] K |
| Rotational velocity (v sin i) | 130[9] km/s |
| Age | 254[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an ordinary A-type main-sequence star with a stellar classification of A1.5V,[3] which indicates it is generating energy through core hydrogen fusion. It is 254[7] million years old with a relatively high projected rotational velocity of 130 km/s.[9] The star has 1.8[7] times the mass of the Sun and 1.9[8] times the Sun's radius. It is radiating 16[6] times the luminosity of the Sun from its photosphere at an effective temperature of 8,528 K.[7]
The star displays an infrared excess with a signature that suggests it has two debris disks. The inner disk is orbiting 7.4 AU from the host star with a mean temperature of 200 K, while the outer disk is 50 K at a separation of 119 AU.[8]
References
edit- ^ a b c d e f 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.
- ^ a b Oja, T. (1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89: 415. Bibcode:1991A&AS...89..415O.
- ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.
- ^ a b Hoffleit, Dorrit; Jaschek, Carlos (1991). The Bright star catalogue. Bibcode:1991bsc..book.....H.
- ^ a b 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.
- ^ a b c 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.
- ^ a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146.
- ^ a b c Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series, 225 (1): 24, arXiv:1606.01134, Bibcode:2016ApJS..225...15C, doi:10.3847/0067-0049/225/1/15, S2CID 118438871, 15.
- ^ a b Dworetsky, Michael M. (November 1974). "Rotational Velocities of a0 Stars". Astrophysical Journal Supplement. 28: 101. Bibcode:1974ApJS...28..101D. doi:10.1086/190312.
- ^ "HD 12467". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-14.
- ^ De Rosa, R. J.; et al. (2014). "The VAST Survey - III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society. 437 (2): 1216. arXiv:1311.7141. Bibcode:2014MNRAS.437.1216D. doi:10.1093/mnras/stt1932.