V1291 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 53m 18.736s[1] |
| Declination | −03° 06′ 52.06″[1] |
| Apparent magnitude (V) | 5.633 |
| Characteristics | |
| Spectral type | A5pv |
| U−B color index | 0.1 |
| B−V color index | 0.2 |
| Variable type | Alpha² CnV variable |
| Astrometry | |
| Radial velocity (Rv) | −20.4 km/s |
| Proper motion (μ) | RA: 22.28 ± 0.36[1] mas/yr Dec.: 14.20 ± 0.31[1] mas/yr |
| Parallax (π) | 12.48 ± 0.36[1] mas |
| Distance | 261 ± 8 ly (80 ± 2 pc) |
| Absolute magnitude (MV) | 5.839 |
| Details | |
| Mass | 3.1 M☉ |
| Radius | 2.1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7,500–10,000 K |
| Rotational velocity (v sin i) | 2 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
V1291 Aquilae is a chemically peculiar variable star. Its period of variability is 223.826 days and this is also most likely the rotational period of the star.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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.Vizier catalog entry
- ↑ Mikulásek, Z. et al. (2003). "Improved period of a slowly rotating cool magnetic CP star HD188041". Contributions of the Astronomical Observatory Skalnaté Pleso 33 (1): 29–37. Bibcode:2003CoSka..33...29M.
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