52 Sagittarii
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sagittarius |
Right ascension | 19h 36m 42.43288s[1] |
Declination | −24° 53′ 01.0288″[1] |
Apparent magnitude (V) | 4.59[2] |
Characteristics | |
Spectral type | kB8 hB9 HeA0 Va (Sr Fe II)[3] |
U−B color index | -0.15[4] |
B−V color index | -0.06[4] |
Astrometry | |
Radial velocity (Rv) | -19.00[5] km/s |
Proper motion (μ) | RA: +68.30[1] mas/yr Dec.: -21.51[1] mas/yr |
Parallax (π) | 17.20 ± 0.23[1] mas |
Distance | 190 ± 3 ly (58.1 ± 0.8 pc) |
Absolute magnitude (MV) | 0.77[2] |
Details | |
Mass | 3.0[6] M☉ |
Radius | 2.1[7] R☉ |
Luminosity | 61[8] L☉ |
Surface gravity (log g) | 4.19[9] cgs |
Temperature | 10,590[8] K |
Metallicity [Fe/H] | 0.00[10] dex |
Rotational velocity (v sin i) | 48[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
52 Sagittarii (52 Sgr) is a class B8[3] (blue main-sequence) star in the constellation Sagittarius. Its apparent magnitude is 4.59[2] and it is approximately 190 light years away based on parallax.[1]
It has one companion at separation 2.4" with magnitude 9.2 and spectral class in K2V-K4V, believed to be the source of X-ray emissions from the system.[11][12]
References
- 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 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. Vizier catalog entry
- 1 2 Garrison, R. F.; Gray, R. O. (1994). "The late B-type stars: Refined MK classification, confrontation with stromgren photometry, and the effects of rotation". The Astronomical Journal. 107: 1556. Bibcode:1994AJ....107.1556G. doi:10.1086/116967.
- 1 2 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
- ↑ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
- ↑ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. Vizier catalog entry
- ↑ Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
- 1 2 3 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. Vizier catalog entry
- ↑ 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. Vizier catalog entry
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. Vizier catalog entry
- ↑ Hubrig, S.; Marco, O.; Stelzer, B.; Scholler, M.; Huelamo, N. (2007). "Establishing the nature of companion candidates to X-ray-emitting late B-type stars". Monthly Notices of the Royal Astronomical Society. 381 (4): 1569. arXiv:0708.0860. Bibcode:2007MNRAS.381.1569H. doi:10.1111/j.1365-2966.2007.12325.x.
- ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
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