10 Lacertae: Difference between revisions
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|constell= [[Lacerta (constellation)|Lacerta]] |
|constell= [[Lacerta (constellation)|Lacerta]] |
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|ra= {{RA|22|39|15.67864}}<ref name=hipparcos>{{cite journal|bibcode=2007A&A...474..653V}}</ref> |
|ra= {{RA|22|39|15.67864}}<ref name=hipparcos>{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|journal=Astronomy and Astrophysics|volume=474|number2=|date=November 2007|pages=653-664}}</ref> |
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|dec= {{DEC|+39|03|00.9712}}<ref name=hipparcos/> |
|dec= {{DEC|+39|03|00.9712}}<ref name=hipparcos/> |
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|appmag_v=4.880<ref name=ubv>{{cite journal|bibcode=1993A&AS..100..591O}}</ref> |
|appmag_v=4.880<ref name=ubv>{{cite journal|bibcode=1993A&AS..100..591O}}</ref> |
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Revision as of 03:17, 20 February 2016
  | |
| Observation data Epoch {{{epoch}}} Equinox | |
|---|---|
| Constellation | Lacerta |
| Right ascension | 22h 39m 15.67864s[1] |
| Declination | +39° 03′ 00.9712″[1] |
| Apparent magnitude (V) | 4.880[2] |
| Characteristics | |
| Spectral type | O9V[3] |
| U−B color index | −1.010[2] |
| B−V color index | −0.210[2] |
| Variable type | β Cep?[4] |
| Astrometry | |
| Radial velocity (Rv) | −10.10[5] km/s |
| Proper motion (μ) | RA: −0.32[1] mas/yr Dec.: −5.46[1] mas/yr |
| Parallax (π) | 1.89 ± 0.22 mas[1] |
| Distance | 715[6] pc |
| Absolute magnitude (MV) | −4.40[7] |
| Details[7] | |
| Mass | 26.9 M☉ |
| Radius | 8.27 R☉ |
| Luminosity | 102,000 L☉ |
| Surface gravity (log g) | 4.03 cgs |
| Temperature | 36,000 K |
| Rotational velocity (v sin i) | 35 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
10 Lacertae (10 Lac) is a star in the constellation Lacerta. With an apparent magnitude is 4.9, it is located around 700 parsecs (2,300 ly) distant in the small Lacerta OB1 association. It is a hot blue main-sequence star of spectral type O9V, a massive star that is currently fusing its core hydrogen. It is a suspected Beta Cephei variable star.
10 Lacertae was one of the first O-type stars (along with S Monocerotis) to be defined as an anchor point for the MKK spectral classification; since the early twentieth century it has served as such a point. Specifically, the star is representative of O9V stars, meaning relatively cool O-type stars on the main-sequence.[8]
10 Lacertae has an 8th magnitude companion about one arc-minute away.[9]
References
- ^ a b c d e van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474: 653–664. Bibcode:2007A&A...474..653V.
{{cite journal}}: Cite has empty unknown parameter:|number2=(help) - ^ a b c . Bibcode:1993A&AS..100..591O.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) - ^ . Bibcode:2011ApJS..193...24S.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) - ^ . Bibcode:2009yCat....102025S.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) - ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- ^ . arXiv:1107.3758. Bibcode:2011sca..conf..299K.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) - ^ a b . arXiv:astro-ph/0506751. Bibcode:2005A&A...441..711M.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) - ^ Garrison, R. F. (1994). "A Hierarchy of Standards for the MK Process". Astronomical Society of the Pacific. 60: 3. Bibcode:1994ASPC...60....3G.
- ^ . Bibcode:1994CoORB.115.....D.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help)
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