Right ascension 04 03 18.00 Distance 1,000 ly Magnitude 6 Apparent magnitude (V) 6 | Declination +36° 25′ 18.0″ Apparent dimensions (V) 2.5° long Constellation Perseus | |
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Designations NGC 1499, Sharpless 220 Similar North America Nebula, Heart Nebula, IC 405, Rosette Nebula, Westerhout 5 | ||
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The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies. It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, xi Persei .
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The California Nebula was discovered by E. E. Barnard in 1884.
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References
California Nebula Wikipedia(Text) CC BY-SA