  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 55m 13.66706s [1] |
| Declination | 8° 48′ 58.2387″ [1] |
| Apparent magnitude (V) | 4.90 [2] |
| Characteristics | |
| Spectral type | A1V [3] |
| U−B color index | +0.00 [2] |
| B−V color index | +0.00 [2] |
| Astrometry | |
| Radial velocity (Rv) | −10.6±0.9 [4] km/s |
| Proper motion (μ) |
RA: +80.370
[1]
mas/
yr Dec.: +13.282 [1] mas/ yr |
| Parallax (π) | 11.9131 ± 0.2232 mas [1] |
| Distance | 274 ± 5
ly (84 ± 2 pc) |
| Absolute magnitude (MV) | +0.01 [5] |
| Details | |
| Mass | 2.84 [6] M☉ |
| Radius | 3.1 [7] R☉ |
| Luminosity | 110 [6] L☉ |
| Surface gravity (log g) | 3.90 [8] cgs |
| Temperature | 9,484 [6] K |
| Rotational velocity (v sin i) | 107 [6] km/s |
| Age | 331 [8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho Pegasi, Latinized from ρ Pegasi, is a star in the northern constellation of Pegasus, near the southern constellation boundary with Pisces. This is a probable astrometric binary system, as determined by changes to the proper motion of the visible component. [10] It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.90. [2] The system is located at a distance of approximately 274 light years from the Sun based on parallax, [1] but it is drifting closer with a radial velocity of −10.6 km/s. [4]
This visible component is an A-type main-sequence star with a stellar classification of A1V. [3] The star is 331 [8] million years old and is spinning with a projected rotational velocity of 107 km/s. [6] It has 2.8 [6] times the mass of the Sun and 3.1 [7] times the Sun's radius. The star is radiating 110 [6] times the luminosity of the Sun from its photosphere at an effective temperature of 9,484 K. [6]
References
- ^ a b c d e f 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 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 Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode: 1969AJ.....74..375C, doi: 10.1086/110819
- ^ 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.
- ^ 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 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv: 1201.2052. Bibcode: 2012A&A...537A.120Z. doi: 10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
- ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002. Bibcode: 1999A&A...352..555A. Vizier catalog entry
- ^ a b c 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
- ^ "rho Peg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-16.
- ^ 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.
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 55m 13.66706s [1] |
| Declination | 8° 48′ 58.2387″ [1] |
| Apparent magnitude (V) | 4.90 [2] |
| Characteristics | |
| Spectral type | A1V [3] |
| U−B color index | +0.00 [2] |
| B−V color index | +0.00 [2] |
| Astrometry | |
| Radial velocity (Rv) | −10.6±0.9 [4] km/s |
| Proper motion (μ) |
RA: +80.370
[1]
mas/
yr Dec.: +13.282 [1] mas/ yr |
| Parallax (π) | 11.9131 ± 0.2232 mas [1] |
| Distance | 274 ± 5
ly (84 ± 2 pc) |
| Absolute magnitude (MV) | +0.01 [5] |
| Details | |
| Mass | 2.84 [6] M☉ |
| Radius | 3.1 [7] R☉ |
| Luminosity | 110 [6] L☉ |
| Surface gravity (log g) | 3.90 [8] cgs |
| Temperature | 9,484 [6] K |
| Rotational velocity (v sin i) | 107 [6] km/s |
| Age | 331 [8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho Pegasi, Latinized from ρ Pegasi, is a star in the northern constellation of Pegasus, near the southern constellation boundary with Pisces. This is a probable astrometric binary system, as determined by changes to the proper motion of the visible component. [10] It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.90. [2] The system is located at a distance of approximately 274 light years from the Sun based on parallax, [1] but it is drifting closer with a radial velocity of −10.6 km/s. [4]
This visible component is an A-type main-sequence star with a stellar classification of A1V. [3] The star is 331 [8] million years old and is spinning with a projected rotational velocity of 107 km/s. [6] It has 2.8 [6] times the mass of the Sun and 3.1 [7] times the Sun's radius. The star is radiating 110 [6] times the luminosity of the Sun from its photosphere at an effective temperature of 9,484 K. [6]
References
- ^ a b c d e f 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 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 Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode: 1969AJ.....74..375C, doi: 10.1086/110819
- ^ 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.
- ^ 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 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv: 1201.2052. Bibcode: 2012A&A...537A.120Z. doi: 10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
- ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002. Bibcode: 1999A&A...352..555A. Vizier catalog entry
- ^ a b c 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
- ^ "rho Peg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-16.
- ^ 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.
| Stars |
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|
Star clusters |
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| Nebulae |
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| Galaxies |
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