HD 18391
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 02h 59m 48.7225s[1] |
| Declination | +57° 39′ 47.673″[1] |
| Apparent magnitude (V) | +6.89[1] |
| Characteristics | |
| Evolutionary stage | yellow supergiant[1] |
| Spectral type | G0Ia[2] |
| Variable type | Classical Cepheid variable[3] |
| Astrometry | |
| Radial velocity (Rv) | −38.47±0.68[1] km/s |
| Proper motion (μ) | RA: 0.227 mas/yr[1] Dec.: -1.376 mas/yr[1] |
| Parallax (π) | 0.4084 ± 0.021 mas |
| Distance | 8,000 ± 400 ly (2,400 ± 100 pc) |
| Details | |
| Mass | 15[4] M☉ |
| Radius | ~200[3] R☉ |
| Luminosity | 42,800[3] L☉ |
| Temperature | 5,871[5] K |
| Other designations | |
HD 18391, HIP 13962, SAO 23749 | |
| Database references | |
| SIMBAD | data |
HD 18391, also named HIP 13962 or SAO 23749, is a yellow supergiant star in the constellation Cassiopeia, the star is located at around 8,000 light years away from earth[1]
Variability[edit]
HD 18391 is an suspected classical Cepheid variable star, Because It's spectral type was G0Ia, and HD 18391's size was about 200 times of the sun[2]
The high-precision effective temperature has determined 161 supergiant stars with spectral type of F to K by line-depth ratios, which the application range was 3,327 °C to 7,527 °C, and the zero point was less than 100 to 200 Kelvin. [5]
Evolution[edit]
HD 18391 is run out It's hydrogen fuel and begins evolving toward into an red supergiant star, the Perkin Catalog gives the HD 18391's mass at 15 times of the sun.[4]
See also[edit]
References[edit]
- ^ a b c d e f g 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 "Spectral classification of middle-type supergiants in the photographic infrared". The SAO/NASA Astrophysics Data System. 1981. Bibcode:1981PASP...93...45B. doi:10.1086/130773.
- ^ a b c Marco, A.; Negueruela, I.; González-Fernández, C.; Maíz Apellániz, J.; Dorda, R.; Clark, J. S. (2014-07-01). "VdBH 222: a starburst cluster in the inner Milky Way⋆". Astronomy and Astrophysics. 567: A73. arXiv:1405.7266. Bibcode:2014A&A...567A..73M. doi:10.1051/0004-6361/201423897. ISSN 0004-6361. S2CID 53533846.
- ^ a b "The Perkins Catalog of Revised MK Types for the Cooler Stars". The SAO/NASA Astrophysics Data System. 1989. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ^ a b "High-precision effective temperatures of 161 FGK supergiants from line-depth ratios". The SAO/NASA Astrophysics Data System. 2007. Bibcode:2007MNRAS.378..617K. doi:10.1111/j.1365-2966.2007.11804.x.
