NGC 433 is an open cluster in the northern constellation of Cassiopeia, located at a distance of 6,500 light years from the Sun.[1] It was discovered on September 29, 1829, by John Herschel, and was described by John Dreyer as "cluster, small, a little compressed."[4] The cluster is considered on the poor side, with only 12 stars above magnitude 16.[5] It has a linear diameter of 26.3 ly, with around 479 times the mass of the Sun and an age of 65 million years.[2]
| NGC 433 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 01h 15m 12.0s[1] |
| Declination | +60° 08′ 00″[1] |
| Distance | 6.5 kly (2.0 kpc)[1] |
| Physical characteristics | |
| Mass | 479+810 −301[2] M☉ |
| Estimated age | 65[2] Myr |
| Other designations | C 0112+598, OCISM 71, OCl 319, [KPR2004b] 16, [KPS2012] MWSC 0110.[3] |
| Associations | |
| Constellation | Cassiopeia |