Ordinary Meeting, 2003 November 29
References
1 Binney, J., and Merrifield, M., Galactic Astronomy, Princeton (1998)
Name |
Constel. |
Textbook description |
Speaker's comments |
Class |
Mag |
NGC 4833 |
Musca |
Bright large round globular cluster. |
Easy globular cluster. |
8 |
7.4 |
NGC 4372 |
Musca |
Pretty faint large round globular cluster. |
Mod. Large, mod. faint, Globular cluster. |
12 |
7.8 |
NGC 3228 |
Vela |
Large open cluster. |
Very large, quite bright, open cluster. |
I 1p* |
6.0 |
NGC 104 / 47 Tuc |
Toucana |
Very large very bright extremely round. |
Very large, very bright, Globular cluster. |
3 |
4.0 |
NGC 3372 |
Carina |
The Great η Carina Nebula. |
Large bright nebula. |
|
|
NGC 2808 |
Carina |
Very large, extremely, round globular cluster. |
Small bright globular cluster. |
1 |
6.3 |
NGC 3532 |
Carina |
Extremely large round open cluster. |
Very large open cluster. |
II 1m* |
3.0 |
NGC 6293
|
Ophiuchus
|
Small, quite bright, globular cluster |
Small, quite bright, globular cluster. |
4 |
8.2 |
NGC 6235
|
Ophiuchus
|
Pretty faint, large, round globular. |
Mod. faint globular cluster. |
4 |
8.2 |
NGC 6218 / M12 |
Ophiuchus |
Very large, very bright globular |
Bright globular cluster. |
9 |
6.6 |
NGC 5139 / Ω-Centurai |
Centaurus |
Extremely large, bright, extremely round, globular cluster. |
Fantastic. |
8 |
3.7 |
NGC 6405 / M6 |
Scorpius |
Large, irregular, round. |
-- |
III 2p* |
4.2 |
NGC 6475 / M7 |
Scorpius |
Very bright. |
-- |
II 2r* |
3.3 |
NGC 6496 |
Scorpius |
Pretty large, moderately extended globular cluster. |
Small, quite faint, globular cluster. |
12 |
9.2 |
NGC 6541 |
Scorpius |
Mod. Large, very bright, globular cluster. |
Bright round extremely compressed. |
3 |
6.6 |
NGC 6388 |
Scorpius |
Very bright, large, round globular cluster. |
Small bright globular cluster. |
3 |
6.9 |
NGC 6121 / M4 |
Scorpius |
Mod. Large, very bright, globular cluster. |
-- |
9 |
5.9 |
NGC 6144 |
Scorpius |
Considerably large moderately compressed globular cluster. |
Mod. large, mod. Faint globular cluster. |
11 |
9.1 |
NGC 6093 |
Scorpius |
Very bright, large globular cluster. |
Fairly small, quite bright globular cluster. |
2 |
7.2 |
NGC 6723 |
Sagittarius |
Very large, very little extended globular cluster. |
-- |
7 |
7.3 |
NGC 6715 / M54 |
Sagittarius |
Very bright, large, round globular cluster. |
-- |
3 |
7.7 |
NGC 6523 / M8 |
Sagittarius |
Very bright, very large, irregular. |
Lagoon Nebula. |
-- |
5.0 |
NGC 6626 / M28 |
Sagittarius |
Very bright, large round. |
Small fairly faint globular cluster. |
4 |
6.9 |
NGC 6656 / M22 |
Sagittarius |
Very bright, very large, round compressed. |
Small very bright globular cluster. |
7 |
5.5 |
NGC 6809 / M55 |
Sagittarius |
Pretty bright, large, round. |
Very large bright globular cluster. |
11 |
7.0 |
Table 1: Southern Hemisphere targets, mostly open/globular clusters, with standard textbook descriptions compared to Mr Johnston's own descriptions. Also listed are the speaker's magnitude estimates, and Shapley classifications. Asterisked classifications are according to Trumpler scheme (for explanation, see Binney and Merrifield pp. 378)1
© 2004 Dominic Ford / The British Astronomical Association.