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) | 5.65[2] |
| Characteristics | |
| Spectral type | F0VpSrCrEu[3] |
| U−B color index | +0.10[2] |
| B−V color index | +0.20[2] |
| Variable type | α² CVn[4] |
| Astrometry | |
| Radial velocity (Rv) | −20.4±0.4[5] 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 mas[1] |
| Distance | 261 ± 8 ly (80 ± 2 pc) |
| Details | |
| Luminosity | 27[6] L☉ |
| Surface gravity (log g) | 3.91±0.42[7] cgs |
| Temperature | 9506±449[7] K |
| Metallicity [Fe/H] | 1.00[7] dex |
| Rotational velocity (v sin i) | 49[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
V1291 Aquilae is a chemically peculiar Ap star. This is a variable star of type Alpha² Canum Venaticorum with a variability period of 223.826 days. This is most likely the mean rotational period of the star.[9]
References
- ^ a b c d e 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
- ^ a b c Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
- ^ Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.
- ^ Kukarkin, B. V.; et al. (1981), "Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars)", Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (1981), Moscow: Academy of Sciences USSR Shternberg, Bibcode:1981NVS...C......0K
- ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- ^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
- ^ a b c Prugniel, P.; Vauglin, I.; Koleva, M. (2011). "The atmospheric parameters and spectral interpolator for the MILES stars". Astronomy & Astrophysics. 531: A165. arXiv:1104.4952. Bibcode:2011A&A...531A.165P. doi:10.1051/0004-6361/201116769.
- ^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393 (3): 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943
- ^ 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.
- Sources
Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram, 4, Bibcode:1962MtSOM...4....1B
External links
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