MY Cephei
MY Cephei (IRC +60375) is a red supergiant located in open cluster NGC 7419 in the constellation of Cepheus. It is a semiregular variable star with a maximum brightness of magnitude 14.4 and a minimum of magnitude 15.5.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 54m 31.698s |
| Declination | +60° 49′ 38.97″ |
| Apparent magnitude (V) | 14.4–15.5 |
| Characteristics | |
| Evolutionary stage | Extreme OH/IR red supergiant |
| Spectral type | M7–7.5 I (M6–7Iab) |
| Apparent magnitude (G) | 10.225 |
| Apparent magnitude (H) | 2.98 |
| Apparent magnitude (K) | 2.14 |
| Variable type | SRc |
| Astrometry | |
| Proper motion (μ) | RA: –2.637 mas/yr Dec.: –1.883 mas/yr |
| Parallax (π) | 0.3398 ± 0.0708 mas |
| Distance | 3,000+350 −290 pc |
| Details | |
| Mass | 14.5 M☉ |
| Radius | 1,134–2,061 R☉ |
| Luminosity | 155,000–310,000 L☉ |
| Temperature | 3,000–3,595 K |
| Age | 9 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
MY Cephei has an unusual spectral type of M7.5, one of the latest spectral types of any supergiant, and is one of the most luminous and coolest red supergiants, as well as one of the largest known stars. If placed at the center of the Solar System, the star's surface would engulf the orbit of Jupiter and possibly even the orbit of Saturn.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.