MY Cephei
| 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 | M3, 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 | 1,028 ± 169 – 1,138 ± 387 R☉ |
| Luminosity | 159,000+60,000 −44,000 – 195,000+173,000 −92,000 L☉ |
| Temperature | 3,595±31 K |
| Age | 9 Myr |
| Other designations | |
| MY Cep, IRC +60375, 2MASS J22543171+6049388, IRAS 22525+6033, RAFGL 2987 | |
| Database references | |
| SIMBAD | data |
MY Cephei (IRC +60375) is a red supergiant located in the 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.