QY Puppis
Red supergiant star in the constellation of Puppis
From Wikipedia, the free encyclopedia
QY Puppis is a K-type supergiant star in the constellation of Puppis. With a radius of 515 R☉, it is on the smaller end of the largest known stars.[7] A variable star, its apparent magnitude varies from 6.24 to 6.71, making it very faintly visible to the naked eye under ideal observing conditions, when it is at its brightest.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 47m 38.5262s[2] |
| Declination | −15° 59′ 26.480″[2] |
| Apparent magnitude (V) | 6.24 - 6.71[3] |
| Characteristics | |
| Spectral type | K1Ia-Iab[4] |
| Apparent magnitude (J) | 3.746[5] |
| Apparent magnitude (H) | 2.958[5] |
| Apparent magnitude (K) | 2.702[5] |
| Variable type | SRd[3] |
| Astrometry | |
| Proper motion (μ) | RA: −2.017[2] mas/yr Dec.: −3.596[2] mas/yr |
| Parallax (π) | 0.3197±0.0330 mas[2] |
| Distance | 10,200 ly (3,100 pc) |
| Details | |
| Mass | 6.2±0.4[6] M☉ |
| Radius | 515[7] R☉ |
| Luminosity | 62,500–63,700[7] L☉ |
| Surface gravity (log g) | 0.16[8] cgs |
| Temperature | 4,251±46[8] K |
| Metallicity [Fe/H] | 0.05[8] dex |
| Age | 63.6±21.7[6] Myr |
| Other designations | |
| BD−15°2049, HD 63302, HIP 38031, HR 3026, WDS J07478-1601 | |
| Database references | |
| SIMBAD | data |
Properties
In 1981, Armando Arellano Ferro published an article stating that the star, then called HD 63302, might be a variable star.[9] It was given its variable star designation, QY Puppis, in 1985.[10] QY Puppis has been classified in the General Catalogue of Variable Stars as a semiregular variable star of type SRD.[3] QY Puppis has a temperature of 4,251 K,[8] and has expanded to a radius of 515 R☉.[7] It is approximately 60 million years old, with a mass of 6.2 M☉.[6]
