  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23h 37m 50.99418s [1] |
| Declination | −45° 29′ 32.4672″ [1] |
| Apparent magnitude (V) | 4.74 [2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A1/2V [3] |
| U−B color index | +0.09 [2] |
| B−V color index | +0.08 [2] |
| Astrometry | |
| Radial velocity (Rv) | +3.40 [4] km/s |
| Proper motion (μ) |
RA: +70.71
[1]
mas/
yr Dec.: −12.66 [1] mas/ yr |
| Parallax (π) | 16.29 ± 0.22 mas [1] |
| Distance | 200 ± 3
ly (61.4 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.80 [5] |
| Details | |
| Mass | 2.55 [6] M☉ |
| Radius | 2.2 [7] R☉ |
| Luminosity | 41.42 [5] L☉ |
| Surface gravity (log g) | 3.92 [6] cgs |
| Temperature | 9,230 [6] K |
| Metallicity [Fe/H] | −0.01 [8] dex |
| Rotational velocity (v sin i) | 141 [6] km/s |
| Age | 482 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 222095 is a single [10] star in the southern constellation of Phoenix, near the western constellation border with Grus. It has a white hue and is visible to the naked eye with an apparent visual magnitude of 4.74. [2] The star is located at a distance of is approximately 200 light years based on parallax, [1] and it is drifting further away with a radial velocity of +3.4 km/s. [4]
This object is an A-type main-sequence star with a stellar classification of A1/2V. [3] It has a high rate of spin with a projected rotational velocity of 141 [6] to 165 km/s, giving it an equatorial bulge that is 4% larger than the polar radius. [11] The star is 482 million years old with 2.55 [6] times the mass of the Sun and around 2.2 [7] times the Sun's radius. It is radiating 41 [5] times the luminosity of the Sun from its photosphere at an effective temperature of 9,230 K. [6] The chemical abundance of the star's outer atmosphere is similar to that in the Sun. [8]
- ^ a b c d e f 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. Vizier catalog entry
- ^ 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.
- ^ a b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H.
- ^ a b 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.
- ^ a b c 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. Vizier catalog entry
- ^ a b c d e f g h David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154. Bibcode: 2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754
- ^ a b Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814. Bibcode: 2012AstL...38..771G. doi: 10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
- ^ "HD 222095". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-19.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID 119273474.
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| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23h 37m 50.99418s [1] |
| Declination | −45° 29′ 32.4672″ [1] |
| Apparent magnitude (V) | 4.74 [2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A1/2V [3] |
| U−B color index | +0.09 [2] |
| B−V color index | +0.08 [2] |
| Astrometry | |
| Radial velocity (Rv) | +3.40 [4] km/s |
| Proper motion (μ) |
RA: +70.71
[1]
mas/
yr Dec.: −12.66 [1] mas/ yr |
| Parallax (π) | 16.29 ± 0.22 mas [1] |
| Distance | 200 ± 3
ly (61.4 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.80 [5] |
| Details | |
| Mass | 2.55 [6] M☉ |
| Radius | 2.2 [7] R☉ |
| Luminosity | 41.42 [5] L☉ |
| Surface gravity (log g) | 3.92 [6] cgs |
| Temperature | 9,230 [6] K |
| Metallicity [Fe/H] | −0.01 [8] dex |
| Rotational velocity (v sin i) | 141 [6] km/s |
| Age | 482 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 222095 is a single [10] star in the southern constellation of Phoenix, near the western constellation border with Grus. It has a white hue and is visible to the naked eye with an apparent visual magnitude of 4.74. [2] The star is located at a distance of is approximately 200 light years based on parallax, [1] and it is drifting further away with a radial velocity of +3.4 km/s. [4]
This object is an A-type main-sequence star with a stellar classification of A1/2V. [3] It has a high rate of spin with a projected rotational velocity of 141 [6] to 165 km/s, giving it an equatorial bulge that is 4% larger than the polar radius. [11] The star is 482 million years old with 2.55 [6] times the mass of the Sun and around 2.2 [7] times the Sun's radius. It is radiating 41 [5] times the luminosity of the Sun from its photosphere at an effective temperature of 9,230 K. [6] The chemical abundance of the star's outer atmosphere is similar to that in the Sun. [8]
- ^ a b c d e f 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. Vizier catalog entry
- ^ 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.
- ^ a b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H.
- ^ a b 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.
- ^ a b c 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. Vizier catalog entry
- ^ a b c d e f g h David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154. Bibcode: 2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754
- ^ a b Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814. Bibcode: 2012AstL...38..771G. doi: 10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
- ^ "HD 222095". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-19.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID 119273474.
| Stars |
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| Galaxies |
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