maging telescope or lens: Vixen VSD
Imaging camera: Starlight Express SXVR-H18
Mount: Sky-Watcher NEQ6 Pro
Guiding telescope or lens: Vixen VSD
Software: Sequence Generator Pro
Filter: Baader H-alpha 3.5 Nm
Accessory: Starlight Xpress Lodestar Guider
Dates: Jan. 26, 2016
Locations: Home observatory, Valencia, Spain
Monoceros is a faint constellation on the celestial equator. Its name is Greek for unicorn. Its definition is attributed to the 17th-century Dutch cartographer Petrus Plancius.
Monoceros is home to The Rosette Nebula , the Christmas Tree Cluster and the Cone Nebula.
The Rosette Nebula (NGC 2237, 2238, 2239, and 2246) is a diffuse nebula in Monoceros. It has an overall magnitude of 6.0 and is 4900 light-years from Earth. The Rosette Nebula, over 100 light-years in diameter, has an associated star cluster and possesses many Bok globules in its dark areas. It was independently discovered in the 1880s by Lewis Swift (early 1880s) and Edward Emerson Barnard (1883) as they hunted for comets.
The Christmas Tree Cluster (NGC 2264) is another open cluster in Monoceros. Named for its resemblance to a Christmas tree, it is fairly bright at an overall magnitude of 3.9; it is 2400 light-years from Earth. The variable star S Monocerotis represents the tree’s trunk, while the variable star V429 Monocerotis represents its top.
The Cone Nebula (NGC 2264), associated with the Christmas Tree Cluster, is a very dim nebula that contains a dark conic structure. It appears clearly in photographs, but is very elusive in a telescope. The nebula contains several Herbig-Haro objects, which are small irregularly variable nebulae. They are associated with protostars.