Tuesday, February 16, 2010
After more than a two month hiatus from sketching deep sky objects due to cloudy or very cold weather, I took the opportunity to sketch these objects last Saturday night while observing at a local airstrip. NGC-1199 is a galaxy in Eridanus, one of many I wanted to sketch that night but sky conditions were not very good and this was the only one I was able to see. As such it was small, round and it's bright inner core was visible. Eridanus has numerous galaxies that are visible in modest telescopes that can be seen from the United States and along the border with Fornax is a rich galaxy cluster as well. Also located in Eridanus is the very bright double shell planetary nebula NGC-1535, also known as Cleopatra's Eye. The larger but faint outer shell surrounds the very bright and younger inner shell, which has a hole through which the central star gleams. It's a great object for small telescopes and it takes high powers and light polluted locations very well. It's definitely the best deep sky object in Eridanus.
NGC-972 is one of a number of moderately bright to faint galaxies visible in the constellation Aries. It's fairly bright and appears as a faint oval object with a brighter core at 150X. The Canis Major galaxy NGC-2207 also was observed as a faint very elongated oval with a slightly brighter core. This galaxy is anything but easy from the hazy and light polluted sites I make do with, but it was evident despite the curious difficulty I had seeing galaxies in Eridanus that were easy objects the last time I looked for them. The sky was very patchy transparency wise.
The open clusters NGC-1220 and 1245 in Perseus were also observed. NGC-1245 was a fairly large swarm of faint to very faint stars and made a pretty grouping of stars embedded in the rich Milky Way star fields that dominate Perseus. NGC-1220 on the other hand was a lot more difficult to find, and at first glance it looks like a distant unresolved globular cluster. Even at 188X, only a few stars appeared surrounded by a hazy glow of other stars too faint to see individually, but their collective glow was visible in the telescope.
Besides these objects, I observed the Orion nebula and the planetary nebulae NGC-2438, 2440 and 2452 in Puppis, along with the emission nebula NGC-2467. In Gemini I located the faint but very rich open cluster NGC-2266, and in Orion the nebulae NGC-1788 and 1999 were also observed. In Monoceros I observed the planetary nebula NGC-2346 and the reflection nebula NGC-2261, also known as Hubble's Variable Nebula. Finally, I looked at the brightest galaxy in Aries, NGC-772 and the galaxies NGC-1023 and NGC-1161 in Perseus.