jaspalchadha Posted July 20, 2015 Share Posted July 20, 2015 NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is thought to be about 21 million years old, and about 7,900 light years from Earth. It contains about 150 stars. There are at least a several dim galaxies in the field, all 17th magnitude or fainter.Colour is a function of temperature (redder is cooler; bluer is hotter) there are several galaxies in the view of fieldFew galaxies that confirmed by SIMBAD Database267 Million Light yearsPGC 2528351 galaxy (15+ Mag)PGC137485 galaxy (15+ Mag)PGC 4831 galaxyTechnical DataDate: 19/07/2015, London UK ( Poor conditions )Telescope: Altair Astro RC 250TT with Focal reducerQHY9S MONO CCDChroma Technology filters L 5 x 300 seconds RGB 5 x 300 secondsIoptron CEM60 mounthttps://www.flickr.com/photos/95267225@N06/19674251199/in/dateposted-public/ Link to comment Share on other sites More sharing options...
sammak127 Posted July 20, 2015 Share Posted July 20, 2015 i really like that.. forgive my newbie question, but what makes the sort of starburst effect on some star images happen? Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 20, 2015 Author Share Posted July 20, 2015 Are you talking about the twinkle effect ?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
xtreemchaos Posted July 20, 2015 Share Posted July 20, 2015 thats a great image mate, lovely detail, thanks for sharing. charl. Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 20, 2015 Author Share Posted July 20, 2015 Glad you like it Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Stu Posted July 20, 2015 Share Posted July 20, 2015 Very nicely done! One of my favourites visually. Link to comment Share on other sites More sharing options...
Stu Posted July 20, 2015 Share Posted July 20, 2015 i really like that.. forgive my newbie question, but what makes the sort of starburst effect on some star images happen?Sammak, these are diffraction spikes caused by the secondary support vanes which form a cross. Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 20, 2015 Author Share Posted July 20, 2015 Thanks bigsumorian. And thanks for the answer I suspected that what he/she meant :-PSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
KyleStoke Posted July 20, 2015 Share Posted July 20, 2015 Great image one of my favorite targets Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 20, 2015 Author Share Posted July 20, 2015 Thank you Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
mdstuart Posted July 20, 2015 Share Posted July 20, 2015 Lovely colours....and love the galaxies! Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 21, 2015 Author Share Posted July 21, 2015 ThanksSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Paul73 Posted July 21, 2015 Share Posted July 21, 2015 Good choice of target!<<<<<<Great image. Almost 3D.Paul Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 21, 2015 Author Share Posted July 21, 2015 Thanks Paul Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
nucdoc Posted July 25, 2015 Share Posted July 25, 2015 Very nice!This will go on my list of favourite clusters Link to comment Share on other sites More sharing options...
jaspalchadha Posted July 25, 2015 Author Share Posted July 25, 2015 Thank youSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
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