HD 54475

D Puppis, also known as HD 54475, is a B-type star and a pulsating variable in the constellation of Puppis.[1][2] It has an apparent magnitude of 5.783,[1] which is enough to be visible to the unaided eye.[a] The distance to D Puppis, based on a parallax of 4.2±0.2 mas from the Hipparcos satellite, is 776 light-years.[3][b]

HD 54475
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis[4][note 1]
Right ascension 07h 07m 07s[1]
Declination −40° 53′ 35.77″[1]
Apparent magnitude (V) 5.783±0.009[1]
Characteristics
Evolutionary stage B-type main-sequence star[1]
Spectral type B3V[1]
Variable type Pulsating variable[1]
Astrometry
Radial velocity (Rv)6±3.2[1] km/s
Proper motion (μ) RA: −10.554±0.069 mas/yr[1]
Dec.: 11.163±0.0689 mas/yr[1]
Parallax (π)4.2 ± 0.2 mas[3]
Distance776.19 ly
(238.1 pc)[3]
Absolute magnitude (MV)-0.95[2]
Details
Mass6.2±0.1[5] M☉
Radius3.544[6][c] R☉
Luminosity689.67[7] L☉
Temperature15,723[7] K
Age15.8±0.3[5] 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
Database references
SIMBADdata

Characteristics

This is a B-type main-sequence star with a spectral type of B3V.[1] It has 6.2 times the mass of the Sun[5] and 3.54 times the Sun's radius.[6] It radiates 690 times the solar luminosity from its outer atmosphere at a temperature of 15,723 K.[7] Its age is estimated to be of about 15 million years.[5]

The distance to D Puppis is about 776 light-years, based on a parallax of 4.2±0.2 mas from the Hipparcos satellite.[3]

It is mentioned to be a pulsating variable star on SIMBAD,[1] but the American Association of Variable Star Observers does not mention any variable-star type for the star.[4]

Notes

  1. ^ According to the Bortle scale
  2. ^ The distance in parsecs is equivalent to .
  3. ^ Calculated using an angular diameter of 0.1422608 mas and an adopted distance of 231.7 parsecs (756 ly).
  1. ^ Obtained with a right ascension of 07h 07m 0.77s and a declination of −40° 53′ 35.77″[1] on this website.

References

  1. ^ a b c d e f g h i j k l m "HD 54475". SIMBAD. Centre de données astronomiques de Strasbourg.
  2. ^ a b Ford, Dominic. "D-Pup (Star)". In-The-Sky.org. Retrieved 2024-04-15.
  3. ^ a b c d van Leeuwen, F. (2007-11-01). "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. ISSN 0004-6361.
  4. ^ a b "VSX : Detail for NSV 17352". www.aavso.org. Retrieved 2024-04-19.
  5. ^ a b c d 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.
  6. ^ a b Cruzalèbes, P.; Petrov, R. G.; Robbe-Dubois, S.; Varga, J.; Burtscher, L.; Allouche, F.; Berio, P.; Hofmann, K. -H.; Hron, J.; Jaffe, W.; Lagarde, S.; Lopez, B.; Matter, A.; Meilland, A.; Meisenheimer, K. (2019-12-01). "A catalogue of stellar diameters and fluxes for mid-infrared interferometry". Monthly Notices of the Royal Astronomical Society. 490 (3): 3158–3176. arXiv:1910.00542. Bibcode:2019MNRAS.490.3158C. doi:10.1093/mnras/stz2803. ISSN 0035-8711.
  7. ^ a b c McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012-11-01). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.

Sources