HD 100307

Last updated
HD 100307
Observation data
Epoch J2000        Equinox J2000
Constellation Hydra
Right ascension 11h 32m 23.28291s [1]
Declination −26° 44′ 48.4974″ [1]
Apparent magnitude  (V)6.16 [2]
Characteristics
Spectral type M2 III [3]
U−B color index +1.99 [4]
B−V color index +1.67 [4]
Variable type Suspected
Astrometry
Radial velocity (Rv)34.50 ± 0.6 [5] km/s
Proper motion (μ)RA: −83.52 [1] mas/yr
Dec.: 19.85 [1] mas/yr
Parallax (π)4.54±0.36  mas [1]
Distance 720 ± 60  ly
(220 ± 20  pc)
Details [6]
Radius 67.564  R☉
Luminosity 687.324 ± 72.169  L☉
Temperature 3598 ± 125  K
Other designations
CD−26° 8620, HD 100307, HIP 56293, HR 4445, SAO 179969
Database references
SIMBAD data

HD 100307 is a suspected variable star in the constellation of Hydra. Its apparent magnitude is 6.16, [2] but interstellar dust makes it appear 0.346 magnitudes dimmer than it should be. [6] It is located some 340 light-years (104 parsecs) away, based on parallax. [1]

HD 100307 is a M-type red giant. It has evolved from the main sequence to a radius of 67.6 times that of the Sun. It emits 687 times as much energy as the Sun at a surface temperature of 3,598 K. [6]

References

  1. 1 2 3 4 5 6 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.
  2. 1 2 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. ↑ Houk, Nancy (1982). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
  4. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. ↑ 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.
  6. 1 2 3 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . S2CID   73594365.


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