Location of 30 Leonis Minoris (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 10 25 54.81535 |
| Declination | 33° 47′ 46.0309″ |
| Apparent magnitude (V) | 4.72 |
| Characteristics | |
| Spectral type | kF0hF2mF2 or A9IIIa |
| U−B color index | +0.18 |
| B−V color index | +0.25 |
| Astrometry | |
| Radial velocity (Rv) | +13.70 km/s |
| Proper motion (μ) | RA: -73.66 mas/yr Dec.: -59.21 mas/yr |
| Parallax (π) | 13.98 ± 0.21 mas |
| Distance | 233 ± 4 ly (72 ± 1 pc) |
| Absolute magnitude (MV) | 0.45 |
| Details | |
| Mass | 2.28 M☉ |
| Radius | 4.182 R☉ |
| Luminosity | 58 L☉ |
| Surface gravity (log g) | 3.82 cgs |
| Temperature | 7,292 K |
| Metallicity | +0.19 dex |
| Rotational velocity (v sin i) | 34 km/s |
| Other designations | |
| 30 LMi, BD+34°2128, GC 14315, HD 90277, HIP 51056, HR 4090, SAO 62038 | |
| Database references | |
| SIMBAD | data |
30 Leonis Minoris is a single star in the northern constellation of Leo Minor. It is visible to the naked eye as a faint, white-hued point of light with an apparent visual magnitude of 4.72. The distance to this star, as estimated from parallax measurements, is 233 light years. It is drifting away from the Earth with a heliocentric radial velocity of +13.7 km/s.
This object has been catalogued as an Am star and was given a stellar classification of kF0hF2mF2 by Abt and Morrell (1995). This notation indicates the calcium K line matches an F0 star, while the hydrogen and metal lines fit an F2 star. However, Gray et al. (2001) assigned it a class of A9IIIa, matching an A-type giant star.
30 Leonis Minoris has 2.3 times the mass of the Sun and 4.2 times the Sun's radius. It has a moderate rate of spin, showing a projected rotational velocity of 34 km/s. The star is radiating 58 times the Sun's luminosity from its photosphere at an effective temperature of 7,292 K.
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. S2CID 18759600. Vizier catalog entry
- ^ 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. Vizier catalog entry
- ^ Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.
- ^ Gray, R. O.; et al. (April 2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". The Astronomical Journal. 121 (4): 2148–2158. Bibcode:2001AJ....121.2148G. doi:10.1086/319956.
- ^ Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
- ^ 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.
- ^ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
- ^ Masana, E.; et al. (2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy and Astrophysics. 450 (2): 735. arXiv:astro-ph/0601049. Bibcode:2006A&A...450..735M. doi:10.1051/0004-6361:20054021. S2CID 15278668. Vizier catalog entry
- ^ Wu, Yue; et al. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. S2CID 53480665.
- "30 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-19.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- Shorlin, S. L. S.; et al. (September 2002). "A highly sensitive search for magnetic fields in B, A and F stars". Astronomy and Astrophysics. 392 (2): 637–652. Bibcode:2002A&A...392..637S. doi:10.1051/0004-6361:20021192.
| Constellation of Leo Minor | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stars |
| ||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
 Category | |||||||||||||