Object: M24 | Date: 2018 August 2 |
Type: Milky Way star cloud | |
Constellation: Sagittarius | Time & altitude: 22.15 UT 19º |
Catalogue data: | Seeing (5 high): 2/5 |
R.A: 18h 17m | Transparency (5 high): 4/5 |
Dec: -18º 30 | Telescope: 0.5m f4.1 Dob. |
Magnitude 4 | Eyepiece 17mm Ethos x120 |
Size (mins) 120 x 60 | Filters: None |
Notes: My largest field of view is with this eyepiece, 49 arc minutes. So, I can only see the entirety of this object in the finder where the long side is about a quarter of the view. I wonder what Messier saw with his long focal-ratio telescopes and narrow field eyepieces. My main instrument shows huge obscuring dust clouds arrayed along the NW edge of the cloud. The largest is about 1/3rd of the field in diameter, so about 16 arc minutes. Generally the dark areas are not simply black, they show shades of black and look smoky. A bit over half a degree S, on the other side of M24 is NGC 6603 a neat, round, dense star cluster which seems fully resolved. Its stars all appear of a similar magnitude, not much variation. |