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 parallaxof4.2±0.2 mas from the Hipparcos satellite, is 776 light-years.[3][b]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis[4][note 1] |
| Right ascension | 07h07m07s[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] |
| Distance | 776.19 ly (238.1 pc)[3] |
| Absolute magnitude (MV) | -0.95[2] |
| Details | |
| Mass | 6.2±0.1[5] M☉ |
| Radius | 3.544[6][c] R☉ |
| Luminosity | 689.67[7] L☉ |
| Temperature | 15,723[7] K |
| Age | 15.8±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 | |
| SIMBAD | data |
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]
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