  | |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 20h 19m 23.60402s [1] |
| Declination | −19° 07′ 06.6967″ [1] |
| Apparent magnitude (V) | +5.31 [2] |
| Characteristics | |
| Spectral type | K2 III [3] |
| U−B color index | +1.56 [2] |
| B−V color index | +1.43 [2] |
| Astrometry | |
| Radial velocity (Rv) | −9.64±0.16 [1] km/s |
| Proper motion (μ) |
RA: +8.07
[4]
mas/
yr Dec.: −11.31 [4] mas/ yr |
| Parallax (π) | 3.0609 ± 0.1194 mas [1] |
| Distance | 1,070 ± 40
ly (330 ± 10 pc) |
| Absolute magnitude (MV) | −2.38 [5] |
| Details | |
| Mass | 6.3±0.7 [6] M☉ |
| Radius | 67.5+4.2 −6.0 [1] R☉ |
| Luminosity | 1,392±64 [1] L☉ |
| Temperature | 4292+204 −127 [1] K |
| Age | 60.5±17.2 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Sigma Capricorni, Latinized from σ Capricorni, is a solitary [8] star in the southern constellation of Capricornus, [7] 0.5 degree north of the ecliptic. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of +5.31. [2] The star is about 1,070 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −9.6 km/s. [1]
This object is an evolved, K-type giant star with a stellar classification of K2 III. [3] Having exhausted the supply of hydrogen at its core, it has expanded and now has around 67.5 [1] times the girth of the Sun. The star is about 60.5 [6] million years old with 6.3 [6] times the mass of the Sun. It is radiating 1,392 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,292 K. [1]
A magnitude 9.43 visual companion is at an angular separation of 55.90 ″ along a position angle of 179°, as of 2016. [9]
- ^ a b c d e f g h i j k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Fernie, J. D. (May 1983), "New UBVRI photometry for 900 supergiants", Astrophysical Journal Supplement Series, 52: 7–22, Bibcode: 1983ApJS...52....7F, doi: 10.1086/190856.
- ^ a b Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode: 1988mcts.book.....H.
- ^ a b 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
- ^
a
b
"* sig Cap".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2017-05-12.
{{ cite web}}: CS1 maint: postscript ( link) - ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode: 2001AJ....122.3466M, doi: 10.1086/323920
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| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 20h 19m 23.60402s [1] |
| Declination | −19° 07′ 06.6967″ [1] |
| Apparent magnitude (V) | +5.31 [2] |
| Characteristics | |
| Spectral type | K2 III [3] |
| U−B color index | +1.56 [2] |
| B−V color index | +1.43 [2] |
| Astrometry | |
| Radial velocity (Rv) | −9.64±0.16 [1] km/s |
| Proper motion (μ) |
RA: +8.07
[4]
mas/
yr Dec.: −11.31 [4] mas/ yr |
| Parallax (π) | 3.0609 ± 0.1194 mas [1] |
| Distance | 1,070 ± 40
ly (330 ± 10 pc) |
| Absolute magnitude (MV) | −2.38 [5] |
| Details | |
| Mass | 6.3±0.7 [6] M☉ |
| Radius | 67.5+4.2 −6.0 [1] R☉ |
| Luminosity | 1,392±64 [1] L☉ |
| Temperature | 4292+204 −127 [1] K |
| Age | 60.5±17.2 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Sigma Capricorni, Latinized from σ Capricorni, is a solitary [8] star in the southern constellation of Capricornus, [7] 0.5 degree north of the ecliptic. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of +5.31. [2] The star is about 1,070 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −9.6 km/s. [1]
This object is an evolved, K-type giant star with a stellar classification of K2 III. [3] Having exhausted the supply of hydrogen at its core, it has expanded and now has around 67.5 [1] times the girth of the Sun. The star is about 60.5 [6] million years old with 6.3 [6] times the mass of the Sun. It is radiating 1,392 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,292 K. [1]
A magnitude 9.43 visual companion is at an angular separation of 55.90 ″ along a position angle of 179°, as of 2016. [9]
- ^ a b c d e f g h i j k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Fernie, J. D. (May 1983), "New UBVRI photometry for 900 supergiants", Astrophysical Journal Supplement Series, 52: 7–22, Bibcode: 1983ApJS...52....7F, doi: 10.1086/190856.
- ^ a b Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode: 1988mcts.book.....H.
- ^ a b 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
- ^
a
b
"* sig Cap".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2017-05-12.
{{ cite web}}: CS1 maint: postscript ( link) - ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode: 2001AJ....122.3466M, doi: 10.1086/323920
| Stars |
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| Galaxies |
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