2012 11 15 – NGC 7092 / M39
2012 11 15, 0410 UT NGC 7092 / M39
Erika Rix, Texas
AT6RC f/9 1370mm, LXD75, 13mm Ethos, 105x
38F, 36% H, clear/calm, Pickering 5, T 4/6
Alt 43deg 45´, Az 309deg 34´
Open cluster (galactic cluster) in Cygnus, 21h 31.9m, +48º 26′, 31’ angular size, 4.59 apparent magnitude
Discovered by Messier in 1764. It’s approximately 800 ly distance from Earth and is 200-300 million years old.
Eyepiece sketch on white photocopy paper with black super-fine felt tipped pen for and #2 pencil, blending stump for the nebulosity. Template is available on the template page of this site.
Sketch before inverting
M39 is an easy-to-spot open cluster in Cygnus, ~9 degrees NE of Deneb. Three stars of 6.81, 6.56 and another 6.81 magnitude, make a chain NNW to SSE with 7.62 – 8.78 magnitude stars forming a chain NNE to SSW. There are several pairings of stars within this 30+ star grouping.
Screen shot from Starry Night Pro Plus 5 – location of M39
Related links:
M39 info on SEDS
The Space Motion of the Galactic Cluster NGC 7092
Authors: Lloyd Evans, T. & Meadows, A. J.
Journal: The Observatory, Vol. 84, p. 148-152 (1964)
Bibliographic Code: 1964Obs….84..148L
Open cluster info on Wiki
PCW Memorial Observatory - Erika Rix 