This image is created from a failed session: While setting up my rig I forgot to add a 21mm spacer and the raws showed some serious coma. For some reason I kept the data to see if I can make anything out of it. My attempts where fruitless until I decided to resort to BlurXteminator and the result is ... well, this picture. I am not a very frequent user of AI in AP, but this is so much better than anything I could achieve manually. As I was using AI already, I did use GraXpert in AI mode as well, which did a decent job too.

The overlay shows id addition to usual information entries in the General Catalog Of Variable Stars (GCVS).

Some object information:

Messier 67 (also known as M67 or NGC 2682) and sometimes called the King Cobra cluster or the Golden Eye cluster is an open cluster in the southern, equatorial half of Cancer. It was discovered by Johann Gottfried Koehler in 1779. Estimates of its age range between 3.2 and 5 billion years. Distance estimates are likewise varied, but typically are 800–900 parsecs (2,600-2,900 ly). Estimates of 855, 840, and 815 pc were established via binary star modelling and infrared color-magnitude diagram fitting.M67 is not the oldest known open cluster, but there are few Milky Way clusters known to be older, and none of those is closer than M67. It is a paradigm study object in stellar evolution:

• it is well-populated
• has negligible amounts of dust obscuration
• all its stars are at the same distance and age, save for approximately 30 anomalous blue stragglers

M67 is one of the most-studied open clusters, yet estimates of its physical parameters such as age, mass, and number of stars of a given type, vary substantially. Richer et al. estimate its age to be 4 billion years, its mass to be 1080 solar masses (M☉), and number its white dwarfs at 150. Hurley et al. estimate its current mass to be 1,400 M☉ and its initial mass to be approximately 10 times as great.It has more than 100 stars similar to the Sun, and numerous red giants. The total star count has been estimated at well over 500. The ages and prevalence of Sun-like stars had led some astronomers to theorize it as the possible parent cluster of the Sun. However, computer simulations have suggested that this is highly unlikely.

(From Wikipedia)

Position relative to the Sun:



Illustrations created with "Where is M13" by Think Astronomy, no longer available from the developer but on various freeware resources on the internet. New version here.