Astronomy:HD 12467
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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 |
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]
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 astronomical unit|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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 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.
- ↑ 3.0 3.1 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. doi:10.1086/192182. Bibcode: 1995ApJS...99..135A.
- ↑ 4.0 4.1 Hoffleit, Dorrit; Jaschek, Carlos (1991). The Bright star catalogue. Bibcode: 1991bsc..book.....H.
- ↑ 5.0 5.1 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 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. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D.
- ↑ 8.0 8.1 8.2 Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series 225 (1): 24, doi:10.3847/0067-0049/225/1/15, 15, Bibcode: 2016ApJS..225...15C.
- ↑ 9.0 9.1 Dworetsky, Michael M. (November 1974). "Rotational Velocities of a0 Stars". Astrophysical Journal Supplement 28: 101. doi:10.1086/190312. Bibcode: 1974ApJS...28..101D.
- ↑ "HD 12467". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+12467.
- ↑ 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. doi:10.1093/mnras/stt1932. Bibcode: 2014MNRAS.437.1216D.
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