Maffei 1
| Maffei 1 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Cassiopeia |
| Right ascension | 02h 36m 35.4s |
| Declination | +59° 39′ 19″ |
| Heliocentric radial velocity | 66.4 ± 5.0 km/s |
| Distance | 2.85 ± 0.36 Mpc 4.4+0.6 −0.5 Mpc |
| Apparent magnitude (V) | 11.14 ± 0.06 (V-band) |
| Characteristics | |
| Type | S0− pec, E3 |
| Size | 75,000 ly (23,000 parsecs) |
| Apparent size (V) | 3′.36 × 1′.68 |
| Other designations | |
| PGC 9892, UGCA 034 Sharpless 191 | |
Maffei 1 is a massive elliptical galaxy near the constellation borders between Perseus and Cassiopeia, located 9.8 million light years away. Once believed to be a member of the Local Group of galaxies, it is now known to belong to a separate group, the IC 342/Maffei Group. It was named after Paolo Maffei, who discovered it and the neighboring Maffei 2 in 1967 via their infrared emissions.
Maffei 1 is a slightly flattened core type elliptical galaxy. It has a boxy shape and is made mainly of old metal-rich stars. It has a tiny blue nucleus in which stars continue to form. Like all large ellipticals it contains a significant population of globular clusters. Maffei 1 is situated at an estimated distance of 3–4 Mpc from the Milky Way. It may be the closest giant elliptical galaxy.
Maffei 1 lies in the Zone of Avoidance and is heavily obscured by the Milky Way's stars and dust. If it were not obscured, it would be one of the largest (about 3⁄4 the size of the full moon), brightest, and best-known galaxies in the sky. It can be observed visually, using a 30–35 cm or bigger telescope under a very dark sky.