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NGC 457 The E.T. Cluster
Posted: Sat Nov 09, 2019 3:11 pm
by mariosi
NGC 457
Constellation Cassiopeia
Right ascension 01h 19m 32.6s
Declination +58° 17′ 27″
Distance 7.922 kly (2.429 kpc)
Apparent magnitude (V) 6.4
Apparent dimensions (V) 13.0′
NGC 457
(also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1787,and lies over 7,900 light years away from the Sun. It has an estimated age of 21 million years.The cluster is sometimes referred by amateur astronomers as the Owl Cluster, Kachina Doll Cluster,the ET Cluster (due to its resemblance to the movie character) or the "Skiing Cluster". Two bright stars, magnitude 5 Phi-1 Cassiopeiae and magnitude 7 Phi-2 Cassiopeiae can be imagined as eyes(Wikipedia).
DAY: Friday DATE: 7/10/16 TIME: 02:00
SCOPE:
Dob Sky- Watcher 10px F.L.1200/f4.7
EYEPIECE: T/S 30mm plossl 2" F.O.V.68°
LOCATION: Mammari
Thanks for looking
Marios
Re: NGC 457 The E.T. Cluster
Posted: Sun Nov 10, 2019 8:56 pm
by bladekeeper
One of my favorite open clusters! Nice sketch, Marios!
Re: NGC 457 The E.T. Cluster
Posted: Sun Nov 10, 2019 8:59 pm
by Lady Fraktor
Well done Marios, a fine sketch
Re: NGC 457 The E.T. Cluster
Posted: Tue Nov 12, 2019 4:59 pm
by mariosi
Thank you!
Marios
Re: NGC 457 The E.T. Cluster
Posted: Tue Nov 12, 2019 5:28 pm
by Thefatkitty
This time I reminded myself it wasn't a photo...
Once again Marios, well done!
All the best,
Re: NGC 457 The E.T. Cluster
Posted: Sat Nov 16, 2019 5:47 am
by mariosi
Thank you Mark for the nice feedback!
Marios
Re: NGC 457 The E.T. Cluster
Posted: Fri Jan 03, 2020 7:12 pm
by pakarinen
First time I stumbled across the cluster, I at first only noticed the two bright stars. Then as I looked more closely I thought, "Hey, wait a minute..."
Excellent sketch!
Re: NGC 457 The E.T. Cluster
Posted: Sat Jan 04, 2020 4:53 am
by mariosi
Thank you very much!
Marios