  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 21m 40.35942s [1] |
| Declination | −17° 50′ 49.9168″ [1] |
| Apparent magnitude (V) | 3.93 [2] |
| Characteristics | |
| Spectral type | A9IV [3] |
| U−B color index | +0.14 [2] |
| B−V color index | +0.22 [2] |
| Variable type | δ Sct [4] |
| Astrometry | |
| Radial velocity (Rv) | +1.20 [5] km/s |
| Proper motion (μ) |
RA: −25.87
[1]
mas/
yr Dec.: +21.46 [1] mas/ yr |
| Parallax (π) | 25.69 ± 0.19 mas [1] |
| Distance | 127.0 ± 0.9
ly (38.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 0.97 [6] |
| Details | |
| Mass | 1.91 [7] M☉ |
| Radius | 3.31+0.24 −0.26 [8] R☉ |
| Luminosity | 30.7±0.8 [8] L☉ |
| Surface gravity (log g) | 3.89 [9] cgs |
| Temperature | 7,469+201 −261 [8] K |
| Metallicity [Fe/H] | −0.02 [10] dex |
| Rotational velocity (v sin i) | 68 [11] km/s |
| Age | 893 [9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho1 Sagittarii, Latinized from ρ1 Sagittarii, is a single, [13] variable star in the southern constellation of Sagittarius. It has a white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around 3.93. [2] The distance to this star is approximately 127 light years based on parallax, [1] and it is drifting further away with a radial velocity of +1.2 km/s. [5] It is positioned near the ecliptic and so it can be occulted by the Moon. [14]
This object has a stellar classification of A9IV, [3] matching a subgiant star that is evolving away from the main sequence. It is a low amplitude Delta Scuti variable, ranging from 3.94 to 3.90 magnitude with a period of 0.05 days. [4] The star is 893 [9] million years old and is spinning with a projected rotational velocity of 68 km/s. [11] It has 1.9 [7] times the mass of the Sun and 3.3 [8] times the Sun's radius. The star is radiating 31 times the luminosity of the Sun from its photosphere at an effective temperature of 7,469 K. [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 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv: astro-ph/0603770. Bibcode: 2006AJ....132..161G. doi: 10.1086/504637. S2CID 119476992.
- ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
- ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode: 1953GCRV..C......0W. LCCN 54001336.
- ^ 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 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 d e 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 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
- ^ 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
- ^ a b Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050 (5th Revised ed.). Bibcode: 1995yCat.5050....0H.
- ^ "rho01 Sgr". 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.
- ^ Edwards, D. A.; Evans, D. S.; Fekel, F. C.; Smith, B. W. (April 1980). "Photoelectric observations of lunar occultations. XI". Astronomical Journal. 85: 478–489. Bibcode: 1980AJ.....85..478E. doi: 10.1086/112700.
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 21m 40.35942s [1] |
| Declination | −17° 50′ 49.9168″ [1] |
| Apparent magnitude (V) | 3.93 [2] |
| Characteristics | |
| Spectral type | A9IV [3] |
| U−B color index | +0.14 [2] |
| B−V color index | +0.22 [2] |
| Variable type | δ Sct [4] |
| Astrometry | |
| Radial velocity (Rv) | +1.20 [5] km/s |
| Proper motion (μ) |
RA: −25.87
[1]
mas/
yr Dec.: +21.46 [1] mas/ yr |
| Parallax (π) | 25.69 ± 0.19 mas [1] |
| Distance | 127.0 ± 0.9
ly (38.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 0.97 [6] |
| Details | |
| Mass | 1.91 [7] M☉ |
| Radius | 3.31+0.24 −0.26 [8] R☉ |
| Luminosity | 30.7±0.8 [8] L☉ |
| Surface gravity (log g) | 3.89 [9] cgs |
| Temperature | 7,469+201 −261 [8] K |
| Metallicity [Fe/H] | −0.02 [10] dex |
| Rotational velocity (v sin i) | 68 [11] km/s |
| Age | 893 [9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho1 Sagittarii, Latinized from ρ1 Sagittarii, is a single, [13] variable star in the southern constellation of Sagittarius. It has a white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around 3.93. [2] The distance to this star is approximately 127 light years based on parallax, [1] and it is drifting further away with a radial velocity of +1.2 km/s. [5] It is positioned near the ecliptic and so it can be occulted by the Moon. [14]
This object has a stellar classification of A9IV, [3] matching a subgiant star that is evolving away from the main sequence. It is a low amplitude Delta Scuti variable, ranging from 3.94 to 3.90 magnitude with a period of 0.05 days. [4] The star is 893 [9] million years old and is spinning with a projected rotational velocity of 68 km/s. [11] It has 1.9 [7] times the mass of the Sun and 3.3 [8] times the Sun's radius. The star is radiating 31 times the luminosity of the Sun from its photosphere at an effective temperature of 7,469 K. [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 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv: astro-ph/0603770. Bibcode: 2006AJ....132..161G. doi: 10.1086/504637. S2CID 119476992.
- ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
- ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode: 1953GCRV..C......0W. LCCN 54001336.
- ^ 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 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 d e 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 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
- ^ 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
- ^ a b Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050 (5th Revised ed.). Bibcode: 1995yCat.5050....0H.
- ^ "rho01 Sgr". 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.
- ^ Edwards, D. A.; Evans, D. S.; Fekel, F. C.; Smith, B. W. (April 1980). "Photoelectric observations of lunar occultations. XI". Astronomical Journal. 85: 478–489. Bibcode: 1980AJ.....85..478E. doi: 10.1086/112700.
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