| Object: M69 (NGC 6637) | Date: 2018 July 16 |
| Type: Globular cluster | |
| Constellation: Sagittarius | Time & altitude: 22.45 UT 6º |
| Catalogue data: | Seeing (5 high): 2/5 |
| R.A: 18h 31m | Transparency (5 high): 4/5 |
| Dec: -32º 21 | Telescope: 0.5m f4.1 Dob. |
| Magnitude 7.7 | Eyepiece 17mm Ethos x120 |
| Size (mins) 7 | Filters: None |
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Notes: At minus 32 declination and consequent altitude I can do little more than say I’ve seen the object. The cluster looks grainy. Checking my sketch with Megastar, the faintest star I have recorded is 11.2m so that’s about 4 magnitudes of extinction. The perceived diameter is about 2 arc minutes, much smaller than the catalogue value. |
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