R Aquilae
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 19h 06m 22.2514s |
Declination | +08° 13′ 48.007″ |
Apparent magnitude (V) | 5.3 - 12.0[1] |
Characteristics | |
Spectral type | M6.5-9e[2] |
U−B color index | 0.37[2] |
B−V color index | 1.60[2] |
Variable type | Mira[3] |
Astrometry | |
Radial velocity (Rv) | 34.60[2] km/s |
Proper motion (μ) | RA: 3.79[2] mas/yr Dec.: -67.01[2] mas/yr |
Parallax (π) | 2.37 ± 0.87[2] mas |
Distance | +45 −32 214[4] pc |
Details | |
Mass | 1.0[4] M☉ |
Radius | 259 ± 67[5] R☉ |
Luminosity | 3,470 ± 50[4] L☉ |
Temperature | 3,000 ± 300[4] K |
Other designations | |
Database references | |
SIMBAD | data |
R Aquilae is a Mira variable in the constellation Aquila. Over a period of approximately 270 days, the apparent magnitude of this star varies from 5.5 to 12.[3] The period was over 300 days when first observed, and has declined steadily since.[6]
References
- ↑ 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.
- 1 2 3 4 5 6 7 "R Aquilae". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 23 June 2014.
- 1 2 VSX; Otero, Sebastian (4 January 2011). "R Aquilae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 December 2013.
- 1 2 3 4 Zhao-Geisler, R.; Quirrenbach, A.; Köhler, R.; Lopez, B. (2012). "Dust and molecular shells in asymptotic giant branch stars". Astronomy & Astrophysics. 545: A56. arXiv:1207.3767. Bibcode:2012A&A...545A..56Z. doi:10.1051/0004-6361/201118150.
- ↑ Van Belle, G. T.; Thompson, R. R.; Creech-Eakman, M. J. (2002). "Angular Size Measurements of Mira Variable Stars at 2.2 Microns. II". The Astronomical Journal. 124 (3): 1706. arXiv:astro-ph/0210167. Bibcode:2002AJ....124.1706V. doi:10.1086/342282.
- ↑ Greaves, J; Howarth, J. J. (June 2000). "Further investigations of R Aquilae". Journal of the British Astronomical Association. 110 (3): 131–142. Bibcode:2000JBAA..110..131G.
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