R Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 06m 22.2514s |
| Declination | +08° 13′ 48.007″ |
| Apparent magnitude (V) | 6.09[1] |
| Characteristics | |
| Spectral type | M6.5-9e[1] |
| U−B color index | 0.37[1] |
| B−V color index | 1.60[1] |
| Variable type | Mira[2] |
| Astrometry | |
| Radial velocity (Rv) | 34.60[1] km/s |
| Proper motion (μ) | RA: 3.79[1] mas/yr Dec.: -67.01[1] mas/yr |
| Parallax (π) | 2.37 ± 0.87[1] mas |
| Distance | approx. 1,400 ly (approx. 400 pc) |
| Absolute magnitude (MV) | −2.04 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
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.[2] The period was over 300 days when first observed, and has declined steadily since.[3]
References
- 1 2 3 4 5 6 7 8 "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.
- ↑ 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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