Key facts
- Right ascension
- 05 36 16.2
- Declination
- −01 ° 12 ′ 07 ″
- Constellation
- Orion
via Wikipedia infobox
Wikidata facts
- Instance of
- H II region
- Constellation
- Orion
- Image
- Ngc1990.jpg
Show 7 more facts
- catalog code
- LBN 205.42-17.78
- Commons category
- NGC 1990
- discoverer or inventor
- William Herschel
- time of discovery or invention
- 1786-02-01
- right ascension
- 83.750
- epoch
- J2000.0
- declination
- -1.70000
Sources (1)
via Wikidata · CC0
~1 min read
Encyclopedic overview
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.
References
Excerpted from Wikipedia’s “NGC 1990” article, available under the CC BY-SA 4.0 licence.
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