53 Persei
Star in the constellation Perseus
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53 Persei is a single[12] variable star in the northern constellation of Perseus. It has the Bayer designation d Persei, while 53 Persei is the Flamsteed designation. The star is visible to the naked eye as a faint, blue-white hued point of light with an apparent visual magnitude of 4.80.[2] It is located approximately 480 light years away from the Sun, as determined from parallax, and is drifting further away with a radial velocity of +7.3 km/s.[6]
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 04h 21m 33.16651s[1] |
| Declination | +46° 29′ 55.9591″[1] |
| Apparent magnitude (V) | 4.80[2] |
| Characteristics | |
| Spectral type | B4IV[3] |
| U−B color index | −0.52[4] |
| B−V color index | −0.03[4] |
| Variable type | SPB[5] |
| Astrometry | |
| Radial velocity (Rv) | +7.30[6] km/s |
| Proper motion (μ) | RA: +21.482[1] mas/yr Dec.: −34.832[1] mas/yr |
| Parallax (π) | 6.8517±0.2700 mas[1] |
| Distance | 480 ± 20 ly (146 ± 6 pc) |
| Absolute magnitude (MV) | −1.42[7] |
| Details | |
| Mass | 5.9±0.1[8] M☉ |
| Radius | 3.98±0.49[7] R☉ |
| Luminosity | 779.8+213.3 −167.5[7] L☉ |
| Surface gravity (log g) | 3.93±0.09[7] cgs |
| Temperature | 16,720[9] K |
| Rotational velocity (v sin i) | 15[10] km/s |
| Age | 50.1±9.3[8] Myr |
| Other designations | |
| d Per, 53 Per, V469 Per, NSV 1560, BD+46°872, FK5 2319, GC 5256, HD 27396, HIP 20354, HR 1350, SAO 39483[11] | |
| Database references | |
| SIMBAD | data |
This star has a stellar classification of B4IV,[3] and was the prototype of a class of variable stars known as slowly pulsating B stars.[14] It was one of the first mid-B type variable stars in the northern hemisphere to be studied.[5] The star undergoes non-radial pulsations with a primary period of 2.36 days. Observation of the star with the BRITE satellite revealed eight separate frequencies in the star's light curve.[5]
53 Persei is around 50[8] million years old with a projected rotational velocity of 15 km/s.[10] It has six[8] times the mass of the Sun and four[7] times the Sun's radius. The star is radiating 780[7] times the luminosity of the Sun from its photosphere at an effective temperature of 16,720 K.[9]