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Caldwell number NGC number Common name Image Type Distance (1000 ly) Constellation Apparent magnitude; C1 NGC 188: Polarissima Cluster: Open Cluster: 4.8 Cepheus: 8.1 C2 NGC 40: Bow-Tie Nebula: Planetary Nebula: 3.5 Cepheus: 11 C3 NGC 4236 Barred Spiral Galaxy: 7,000 Draco: 9.7 C4 NGC 7023: Iris Nebula: Open Cluster and Nebula: 1.4 Cepheus: 7 ...
NGC 2867 (also known as Caldwell 90) is an elliptical [5] Type II [7] planetary nebula in the southern constellation of Carina, just over a degree to the NNW of the star Iota Carinae. [8] It was discovered by John Herschel on April 1, 1834.
This fan-shaped nebula opens from the star R Coronae Australis toward the star T CrA to the south-east. R CrA is a pre-main-sequence star in the Corona Australis molecular complex, one of the closer star-forming regions of the galaxy at a distance of 130 pc. [1] NGC 6729 is a variable nebula which shows irregular variations in brightness and in ...
NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "Blinking Planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding ...
NGC 246 (also known as the Skull Nebula [4] or Caldwell 56) is a planetary nebula in the constellation Cetus. It is the first known planetary nebula to have a hierarchical triple star system at its center. [6] The nebula and the stars associated with it are listed in several catalogs, as summarized by the SIMBAD database. [1]
NGC 2244 (also known as Caldwell 50 or the Satellite Cluster) is an open cluster in the Rosette Nebula, which is located in the constellation Monoceros. This cluster has several O-type stars, super hot stars that generate large amounts of radiation and stellar wind. The age of this cluster has been estimated to be less than 5 million years.
The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest star). It is named because its shape resembles North America .
NGC 3242 (also known as the Ghost of Jupiter, Eye Nebula or Caldwell 59) is a planetary nebula located in the constellation Hydra.. William Herschel discovered the nebula on February 7, 1785, and catalogued it as H IV.27.