HD 54475
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis[2] |
| Right ascension | 07h 07m 07.078s[3] |
| Declination | −40° 53′ 35.77″[3] |
| Apparent magnitude (V) | 5.783±0.009[4] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B3V[5] |
| Variable type | SPB[6] |
| Astrometry | |
| Radial velocity (Rv) | 6±3.2[3] km/s |
| Proper motion (μ) | RA: −10.554 mas/yr[3] Dec.: +11.163 mas/yr[3] |
| Parallax (π) | 4.5288±0.0584 mas[3] |
| Distance | 720 ± 9 ly (221 ± 3 pc) |
| Absolute magnitude (MV) | −1.08[2] |
| Details | |
| Mass | 5.4[7] M☉ |
| Radius | 3.4[3] R☉ |
| Luminosity | 2,609[7] L☉ |
| Surface gravity (log g) | 3.62[7] cgs |
| Temperature | 24,260[7] K |
| Rotational velocity (v sin i) | 200[8] km/s |
| Age | 15.8±0.3[9] Myr |
| Other designations | |
| CD−40 2930, HD 54475, HIP 34339, HR 2691, SAO 218465, TIC 157533670, TYC 7633-2698-1, WISE J070707.07-405335.6[10] | |
| Database references | |
| SIMBAD | data |
HD 54475, also known as D Puppis, is a B-type star and a pulsating variable in the constellation of Puppis. It has an apparent magnitude of 5.783, which is enough to be visible to the unaided eye.[a] The distance to D Puppis, based on a parallax of 4.53±0.06 mas from the Gaia satellite, is 720 light-years.
Characteristics
[edit]This is a B-type main-sequence star with a spectral type of B3V.[5] It has times the mass of the Sun and 3.4 times the Sun's radius.[7] It radiates 2,609 times the solar luminosity from its outer atmosphere at a temperature of 24,360 K. Its age is estimated to be of about 15 million years.[9]
The distance to D Puppis is about 720 light-years, based on a parallax of 4.23±0.06 mas in Gaia Data Release 3.[3]
HD 54475 has been classified as a slowly pulsating B-type star,[6] but it has not been formally named as a variable star. The General Catalogue of Variable Stars lists it as a suspected variable with an amplitude of less than a tenth of a magnitude.[11]
Notes
[edit]- ^ According to the Bortle scale
References
[edit]- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 27 December 2024.
- ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e f g h 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.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
- ^ a b Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor : Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
- ^ a b Balona, L. A.; Ozuyar, D. (2020). "Pulsation among TESS a and B stars and the Maia variables". Monthly Notices of the Royal Astronomical Society. 493 (4): 5871. arXiv:2001.04497. Bibcode:2020MNRAS.493.5871B. doi:10.1093/mnras/staa670.
- ^ a b c d e Fouesneau, M.; Andrae, R.; Dharmawardena, T.; Rybizki, J.; Bailer-Jones, C. A. L.; Demleitner, M. (2022). "Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE". Astronomy and Astrophysics. 662: A125. arXiv:2201.03252. Bibcode:2022A&A...662A.125F. doi:10.1051/0004-6361/202141828.
- ^ Yudin, R. V. (2001). "Statistical analysis of intrinsic polarization, IR excess and projected rotational velocity distributions of classical be stars". Astronomy and Astrophysics. 368 (3): 912. Bibcode:2001A&A...368..912Y. doi:10.1051/0004-6361:20000577.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011-01-01). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. ISSN 0035-8711.
- ^ "HD 54475". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-06-01.
- ^ Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
Sources
[edit]- Stift, Martin (19 April 1979). "Light Variations of HD 54475". Information Bulletin on Variable Stars. 1586 (1586). Konkoly Observatory, Budapest: Commission 27 of the IAU: 1. Bibcode:1979IBVS.1586....1S.
