52 Sagittarii

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52 Sagittarii
Sagittarius constellation map.svg
Red circle.svg

Location of 52 Sagittarii (circled)
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]
Spectral type kB8 hB9 HeA0 Va (Sr Fe II)[3]
U−B color index -0.15[4]
B−V color index -0.06[4]
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]
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
h2 Sagittarii, CD-25°14184, CCDM J19367-2453AB, FK5 736, GC 27089, GSC 06893-02132, HIP 96465, HR 7440, HD 184707, NSV 12191, SAO 188337, WDS J19367-2453AB
Database references

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]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. doi:10.1134/S1063773712050015.  Vizier catalog entry
  3. ^ a b 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. 
  4. ^ a b 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
  5. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336. 
  6. ^ 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. Bibcode:2011MNRAS.410..190T. arXiv:1007.4883Freely accessible. doi:10.1111/j.1365-2966.2010.17434.x.  Vizier catalog entry
  7. ^ 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. Bibcode:1999A&A...352..555A. arXiv:astro-ph/9911002Freely accessible.  Vizier catalog entry
  8. ^ a b c Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. Bibcode:2012A&A...537A.120Z. arXiv:1201.2052Freely accessible. doi:10.1051/0004-6361/201117691.  Vizier catalog entry
  9. ^ 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. Bibcode:2015ApJ...804..146D. arXiv:1501.03154Freely accessible. doi:10.1088/0004-637X/804/2/146.  Vizier catalog entry
  10. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. Bibcode:2012AstL...38..771G. arXiv:1606.08814Freely accessible. doi:10.1134/S1063773712120031.  Vizier catalog entry
  11. ^ 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. Bibcode:2007MNRAS.381.1569H. arXiv:0708.0860Freely accessible. doi:10.1111/j.1365-2966.2007.12325.x. 
  12. ^ 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