This article includes a list of general references, but it lacks sufficient corresponding inline citations. (January 2018) |
NGC 1990 was discovered by William Herschel in 1786 with an 18.7 inch telescope. However, there is doubt that this object exists in reality as several visual searches and modern astrophotography have failed to identify the exact location and extent of the reflection nebula. Modern photographs of the area with cameras show ultraviolet leak that gives the false impression of a large blue nebula around ε Ori (Alnilam). More careful photography does not reveal a nebula in the area. Visual surveys do not reveal the nebula either.
| Emission nebula | |
|---|---|
| H II region | |
| reflection nebula | |
 Nebulosity near around Orion's Belt | |
| Observation data: J2000 epoch | |
| Right ascension | 05h 36m 16.2s |
| Declination | −01° 12′ 07″ |
| Constellation | Orion |
References
edit- "Simbad query". Retrieved October 5, 2009.
- "The NGC/IC Project". Retrieved June 5, 2017.[permanent dead link]
External links
edit
Media related to NGC 1990 at Wikimedia Commons
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