Open cluster
M93 (M93)
In Puppis (Pup) • Magnitude 6.0 • 22 arcminutes
Open the free AstroPlanner with M93 pre-selected, scored against your telescope, location, and the live cloud forecast.
A young, bright open cluster in Puppis shaped somewhat like a butterfly or arrowhead, about 3,600 light-years away. Several of its brightest members are supergiants — stars hundreds of times larger than the Sun that burn so fiercely they will exhaust their fuel within a few million years and end as supernovae.
M93 at a glance
| Catalog IDs | M93, N 2447 |
| Type | Open cluster |
| Constellation | Puppis (Pup) |
| Right ascension | 07h 44m 35s |
| Declination | -23° 52' 12" |
| Apparent magnitude | 6.00 |
| Angular size | 22.0 × 22.0 arcmin |
| Max altitude at 45°N | 21° |
| Best imaging months | Oct, Nov, Dec |
How to image M93
M93 sits in the constellation Puppis at right ascension 07h 44m 35s and declination -23° 52' 12". To frame and integrate it well, AstroPlanner will compute the optimal moonless window for tonight from your location, the field-of-view fit against your sensor and focal length, the suggested total integration time given your aperture and sky Bortle class, and a cloud-aware schedule that drops it from the plan if your nearest cloud forecast spike overlaps the best altitude window.