HD 172910

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HD 172910
Sagittarius constellation map.svg
Red circle.svg

Location of HD 172910 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 18h 44m 19.35901s[1]
Declination −35° 38′ 31.1546″[1]
Apparent magnitude (V) 4.87[2]
Spectral type B2.5V[3]
U−B color index -0.72[2]
B−V color index -0.18[2]
Radial velocity (Rv) +3.90[4] km/s
Proper motion (μ) RA: -0.68[1] mas/yr
Dec.: -27.24[1] mas/yr
Parallax (π) 6.99 ± 0.23[1] mas
Distance 470 ± 20 ly
(143 ± 5 pc)
Absolute magnitude (MV) -0.91[5]
Mass 7.2[6] M
Luminosity 602[5] L
Temperature 15,000[7] K
Metallicity [Fe/H] +0.01[8] dex
Rotational velocity (v sin i) 65[3] km/s
Other designations
CD-35°12876, CCDM J18443-3539A, FK5 3490, GC 25613, GSC 07419-03077, HIP 91918, HR 7029, HD 172910, SAO 210509, WDS J18443-3539A
Database references

HD 172910 is a class B2.5V[3] (blue main-sequence) star in the constellation Sagittarius. Its apparent magnitude is 4.87[2] and it is approximately 467 light years away based on parallax.[1]

It has one companion, B, with magnitude 12.6 and separation 10.0".[9]

In Chinese astronomy, the star is known as the Peasant (農丈人), a single-star asterism within the lunar mansion of the Dipper (Chinese constellation).


  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 d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b c Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ Evans, D. S. (1967). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and their Applications. 30: 57. Bibcode:1967IAUS...30...57E. 
  5. ^ a b 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
  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. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.  Vizier catalog entry
  8. ^ 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
  9. ^ 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