| Object: M18 (NGC 6613) | Date: 2018 August 31 |
| Type: Open cluster | |
| Constellation: Sagittarius | Time & altitude: 21.20 UT 18º |
| Catalogue data: | Seeing (5 high): 3/5 |
| R.A: 18h 20m | Transparency (5 high): 2/5 |
| Dec: -17º 08 | Telescope: 0.5m f4.1 Dob. |
| Magnitude 6.9 | Eyepiece 17mm Ethos x120 |
| Size (mins) 9 | Filters: None |
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Notes: As is often the case at this time of year, transparency overhead is good with NELM better than 5.5m and Milky Way on view but below about 30 degrees it becomes progressively milkier. A sparse cluster with 10 stars of similar brightness in two straight lines, plus a few faint sprinkles. The drawing records the principal stars. |
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