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| Catalogue and alternative designations | NGC
6440 and NGC 6445. NGC
6445 is sometimes known as the
Box nebula.
|
| Type | Globular Cluster (NGC 6440) and Planetary Nebula (NGC 6445) |
| Position | 17 49 05.3, -20 10.2 |
| Constellation | Sagittarius |
| Camera and Telescope | STL6303 and 31.75 cm Ritchey Chretien |
| Focal Ratio | F9 |
| Exposure Details | LRGB =180:90:90:90 with Astrodon series 2 filters all 1x1 |
| Description | NGC 6440 is quite near to the sun as globulars go at only 6000 parsecs but it suffers from 4 magnitudes of interstellar absorption thus making it less prominent than might be expected. NGC 6445 is a planetary nebula approximately 22' to the north east about which not much is known. The size is given as 2.8' x0.9'. |