A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » SpaceBanter.com forum » Others » Astro Pictures
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

NGC 7480/Berkeley 57

Thread Tools Display Modes
Old October 13th 17, 04:58 PM
WA0CKY WA0CKY is offline
Senior Member
First recorded activity by SpaceBanter: Feb 2008
Posts: 689
Default NGC 7480/Berkeley 57

NGC 7423/Berkeley 57 is an open cluster right in the southeast corner of Cepheus. In fact, a piece of the left edge is in Cassiopeia while the very bottom of the image is in Lacerta. It was discovered by William Herschel on November 1, 1788 but isn't in either of the Herschel 400 programs. Dreyer described it as "very faint, pretty large, irregular figure, extremely mottled but not resolved."

WEBDA says it is 1.4 billion years old so a rather old cluster. Tidal forces often break up clusters before they can get this old yet it seems rather well defined even today. It is 13,500 light-years distant so I'd expect from age and distance it to be rather reddened. It is by 0.75 magnitudes. Plus a bit more for its age. Still, it doesn't seem quite as red as I had expected.

Of more interest but even less information is the odd double object to the northeast of the cluster. Western parts are quite red and separated north to south. Southern part seems to have a star-like part and a horizontal nebulous bar. Both fade into a blue blob that appears to surround two stars to the east. Is this a separate object or part of the red object(s). Is the red part two objects or one with a dust band obscuring much of it? SIMBAD identifies a young stellar object as being in the southern part almost in the dust lane like feature, IRAS 22534+5653. NED lists an IR source at the position of the faint star-like object in the northern half 2MASX J22552984+5709244 and the star west of the lower half as another IR source 2MASX J22552796+5709261. Neither NED nor SIMBAD show anything for the blue object that seems to be a jet from the dark lane. Whatever is going on here interests me more than the cluster.

There's only one obvious galaxy in the image, a very red small spherical object southwest of the cluster. It is 2MASX J22541372+5702353 but I have nothing on it, not even a magnitude. I show it to be about 17.7 without calibrating for its red color. It is likely brighter as my sensor has issues with red. NED shows several other galaxies in the image. All I checked were so small and faint they make this one seem big and bright by comparison. None have any helpful data so no annotated image was made.

While I'm showing the full image at 1.5" per pixel rather than my usual 1" the cropped image is at 1" to better show the nebulous object(s).

Attached Thumbnails
Click image for larger version

Name:	NGC7423L4X10RGB2X10.JPG
Views:	370
Size:	741.3 KB
ID:	6720  Click image for larger version

Name:	NGC7423L4X10RGB2X10-67.JPG
Views:	150
Size:	469.9 KB
ID:	6721  

Last edited by WA0CKY : October 13th 17 at 04:59 PM. Reason: Correct typos
Old October 13th 17, 08:25 PM
slilge slilge is offline
Senior Member
First recorded activity by SpaceBanter: Aug 2008
Posts: 151


that nebula is really strange - and interesting.
Wonder what it is.
The cluster is nice too.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Berkeley 80 WA0CKY Astro Pictures 1 October 10th 17 08:47 PM
Berkeley 93 WA0CKY Astro Pictures 1 October 10th 17 08:43 PM
Berkeley 83 WA0CKY Astro Pictures 1 August 31st 17 10:41 PM
Berkeley 30 WA0CKY Astro Pictures 5 April 16th 17 09:41 PM
What's up at Berkeley ... Anthony Ayiomamitis SETI 2 August 15th 05 10:37 PM

All times are GMT +1. The time now is 08:31 PM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2004-2021 SpaceBanter.com.
The comments are property of their posters.