Astronomy:HD 100307
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Short description: Star in the constellation Hydra
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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 | |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 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.
- ↑ Houk, Nancy (1982). Michigan catalogue of two-dimensional spectral types for the HD stars. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode: 1982mcts.book.....H.
- ↑ 4.0 4.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 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. doi:10.1093/mnras/stx1433. Bibcode: 2017MNRAS.471..770M.
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