 W Aquilae showing the close companion Credit: Hubble Legacy Archive | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 15m 23.357s[1] |
| Declination | −07° 02′ 50.33″[1] |
| Apparent magnitude (V) | A: 7.0 - 14.6[2] B:14.8 [3] |
| Characteristics | |
| A | |
| Evolutionary stage | asymptotic giant branch[4] |
| Spectral type | S6/6e[4] (S3,9e - S6,9e[2]) |
| B−V color index | +2.58[5] |
| Variable type | Mira[2] |
| B | |
| Evolutionary stage | main sequence[4] |
| Spectral type | F8/9[4] |
| Astrometry | |
| Radial velocity (Rv) | −18.0[6] km/s |
| Proper motion (μ) | RA: 15.713[1] mas/yr Dec.: 0.103[1] mas/yr |
| Parallax (π) | 2.6735 ± 0.1392 mas[1] |
| Distance | 1,220 ± 60 ly (370 ± 20 pc) |
| Absolute magnitude (MV) | A: −0.7 to +6.9[3] B: +7.1[3] |
| Details | |
| A | |
| Mass | 1.04 - 3[4] M☉ |
| Radius | 444[7][a] R☉ |
| Luminosity | 7,500[8] L☉ |
| Temperature | 2,800[7] K |
| B | |
| Mass | 1.04 - 1.09[4] M☉ |
| Temperature | 5,900 - 6,170[4] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
W Aquilae (W Aql) is a variable star in the constellation of Aquila. It is a type of evolved star known as an S-type star. Due to its relatively close distance of 1,200 light-years (370 pc) and equatorial location, it is easy to observe and heavily studied.[9]
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Cite error: The named reference
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mayerwas invoked but never defined (see the help page). - ^ a b c d e f g Cite error: The named reference
danilovichwas invoked but never defined (see the help page). - ^ Cite error: The named reference
tycho2was invoked but never defined (see the help page). - ^ Cite error: The named reference
gcrvwas invoked but never defined (see the help page). - ^ a b Wallstrom, S. H. J.; Danilovich, T.; Muller, H. S. P.; Gottlieb, C. A.; Maes, S.; Van de Sande, M.; Decin, L.; Richards, A. M. S.; Baudry, A.; Bolte, J.; Ceulemans, T.; De Ceuster, F.; de Koter, A.; Mellah, I. El; Esseldeurs, M. (December 6, 2023). "ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA". Astronomy & Astrophysics. 681: A50. arXiv:2312.03467. doi:10.1051/0004-6361/202347632. ISSN 0004-6361.
- ^ Brunner, M.; Danilovich, T.; Ramstedt, S.; Marti-Vidal, I.; De Beck, E.; Vlemmings, W. H. T.; Lindqvist, M.; Kerschbaum, F. (2018). "Molecular line study of the S-type AGB star W Aquilae". Astronomy & Astrophysics. 617: A23. arXiv:1806.01622. doi:10.1051/0004-6361/201832724. S2CID 67754573.
- ^ Cite error: The named reference
Danilovich2021was invoked but never defined (see the help page).
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