Last night the sky was clear but not especially dark. The measured sky brightness was sqml=19.35 mpsas, which is poor even for Santa Fe. Only two stars in the Little Dipper were easily visible, an indicator of poor transparency. These are not good conditions for photographing faint nebulae and galaxies. Star clusters and solar-system bodies are better targets.
Equpment: Astro-Tech AT72EDII and Olympus E-M5iii camera, ZWO AM3 mount.
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| NGC 457, the "Owl Cluster" (LL) and NGC 436 (UR). |
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| NGC 7789, "Caroline's Rose". |
Caroline's Rose and the Owl Cluster are open clusters in the constellation Cassiopeia.
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| Caroline's Rose (LL), Owl Cluster (top middle). credit: SkySafariAstronomy.com |
There is a trio of small open clusters near the star Kappa Cassiopeiae: NGC 146, NGC 133, and King 14. |
| Kappa Cassiopeiae and three small open clusters |
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| credit: SkySafariAstronomy.com |
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| M37, the "Salt and Pepper Cluster" in Auriga |
The main-belt asteroid (10) Hygeia is currently in the constellation Taurus, shining at magnitude 10.8. It is the fourth largest asteroid.
Two moons of Uranus, Oberon and Titania, were discovered by William Herschel on 11 January 1787. Oberon orbits with a period of about 14.0 days and Titania has an orbital period of 8.7 days. Both moons shine at around magnitude 14. |
| Uranus, Oberon, and Titania. 2x enlargement |
_Hygiea-apP1103184.jpg)
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