| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16 18 17.89900 |
| Declination | −28° 36′ 50.4721″ |
| Apparent magnitude (V) | 4.80 |
| Characteristics | |
| Spectral type | A0 V |
| B−V color index | +0.008±0.018 |
| Astrometry | |
| Radial velocity (Rv) | −13.0±0.8 km/s |
| Proper motion (μ) | RA: −31.971 mas/yr Dec.: −101.295 mas/yr |
| Parallax (π) | 23.0018 ± 0.3267 mas |
| Distance | 142 ± 2 ly (43.5 ± 0.6 pc) |
| Absolute magnitude (MV) | 1.14 |
| Details | |
| Mass | 1.49 or 2.13±0.02 M☉ |
| Radius | 1.60 R☉ |
| Luminosity | 21.46+0.53 −0.51 L☉ |
| Surface gravity (log g) | 3.99±0.13 cgs |
| Temperature | 9,441+109 −108 K |
| Metallicity | −0.27±0.12 dex |
| Rotational velocity (v sin i) | 39 km/s |
| Age | 10 Myr |
| Other designations | |
| d Sco, CD−28° 12037, FK5 3288, HD 146624, HIP 79881, HR 6070, SAO 184301 | |
| Database references | |
| SIMBAD | data |
HD 146624 (d Scorpii) is a single, white-hued star in the southern zodiac constellation of Scorpius. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.80. The distance to HD 146624 can be estimated from its annual parallax shift of 23.0 mas, yielding a separation of 142 light years. At that distance, the visual magnitude is reduced by an extinction of 0.17 due to interstellar dust. It is a member of the Beta Pictoris moving group, a set of ~12 million year old stars that share a common motion through space.
This is an A-type main-sequence star with a stellar classification of A0 V, and is suspected to be chemically peculiar. It is a young star, just 10 million years old, with a projected rotational velocity of 39 km/s. The mass of the star is greater than the Sun's, with De Rosa et al. (2014) estimating 1.49 times the mass of the Sun, while Zorec and Royer (2012) gives a multiplier of 2.13±0.02. It has 1.60 times the Sun's radius and shines with 21 times the Sun's luminosity from its photosphere at an effective temperature of 9,441 K.
The star displays an infrared excess, suggesting a circumstellar disk of orbiting material. This has a mean temperature of 280 K, matching a disk radius of 4.20 AU.
References
- ^ 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.
- ^ 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.
- ^ 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, S2CID 88503488.
- 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, S2CID 59451347, A61.
- ^ Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
- ^ Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ 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.
- ^ Prugniel, Ph.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769, S2CID 54940439.
- "HD 146624". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-03.
- Zuckerman, B.; Song, Inseok; Bessell, M. S.; Webb, R. A. (November 2001), "The β Pictoris Moving Group", The Astrophysical Journal, 562 (1): L87–L90, Bibcode:2001ApJ...562L..87Z, doi:10.1086/337968, S2CID 120493760.
- Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
