PU Aurigae
Star in the constellation Auriga
From Wikipedia, the free encyclopedia
PU Aurigae is an irregular variable star located in the constellation Auriga. A red giant, it varies by 0.1 magnitude around magnitude 5.64,[7] so it is faintly visible to the naked eye. Located around 590 light-years distant, it shines with a luminosity approximately 1,523 times that of the Sun and has a surface temperature of 3,482 K.[2][5]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 18m 15.69723s[2] |
| Declination | +42° 47′ 31.5967″[2] |
| Apparent magnitude (V) | 5.55[3] |
| Characteristics | |
| Spectral type | M4 III[3] |
| Apparent magnitude (G) | 4.17[2] |
| B−V color index | 1.492±0.012[3] |
| Variable type | Lb[4] |
| Astrometry | |
| Radial velocity (Rv) | −38.41±1.02[3] km/s |
| Proper motion (μ) | RA: +18.722±0.183[2] mas/yr Dec.: −30.380±0.144[2] mas/yr |
| Parallax (π) | 5.4835±0.1650 mas[2] |
| Distance | 590 ± 20 ly (182 ± 5 pc) |
| Absolute magnitude (MV) | −0.63[3] |
| Details | |
| Radius | 107[5] R☉ |
| Luminosity | 1,523[5] L☉ |
| Temperature | 3,482[5] K |
| Other designations | |
| PU Aurigae, BD+42° 1239, HD 34269, HIP 24738, HR 1722, SAO 40214, Gaia DR3 207274026495027712[6] | |
| Database references | |
| SIMBAD | data |
Although the star was first found to be variable by Joel Stebbins and Charles Morse Huffer in 1928,[8] it was not given its variable star designation until 1977.[9]
