Target Type R. A. Dec. Constellation Magnitude Size C54 (NGC 2506) Open Cluster 08h 00m 01s -10° 46′ 00″ Monoceros +7.6 12 arcmin Overview This cluster of about 100 stars lies nearly 13,000 light-years away from us. William Herschel discovered it in December 1791. It presents as an elongated, triangular shape and most of its […]
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Target Type R. A. Dec. Constellation Magnitude Size C46 (NGC 2261) Bright Nebula 06h 39m 12s +08° 45′ 00″ Monoceros 9.2 4.0×2.0 arcmins Overview This ghostly nebula is lit by the star R Monocerotis, which can’t be seen directly. William Herschel discovered the apparition in December 1783, describing it as “Considerably bright and fan shaped.”
Challenge #1 – C46, Hubble’s Variable Nebula in Monoceros Read More »
Target Type R. A. Dec. Constellation Magnitude Size C49 (NGC 2238*) Bright Nebula 06h 30m 18s +05° 03′ 00″ Monoceros +5.5 80×60 arcmin Overview Also known as the Great Nebula in Monoceros and Swift’s Nebula, the Rosette Nebula is comprised of *four different NGC designations: 2237, 2238, 2239, and 2246. The open cluster NGC 2244
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Target Type R. A. Dec. Constellation Magnitude Size C50 (NGC 2244) Open Cluster 06h 31m 55s 04° 56′ 00″ Monoceros +4.8 29 arcmin Overview The cluster at the heart of the Rosette Nebula (C49) is so inextricably linked to it, that this separate guide is only included in the Caldwell Guides for completeness. To read
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Target Type R. A. Dec. Constellation Magnitude Size M50 (NGC 2323) Open Cluster 07h 02m 42s -08° 35′ 35″ Monoceros +5.90 14.0 arcmin Overview Monoceros, the Unicorn, is a constellation we seldom talk about. There is not a lot to interest us within its boundaries, but near where it meets Canis Major, with Sirius, the
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