NGC 6934

Globulars or Open, clusters of stars can be neat viewing.
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Christopher K.
Posts: 4763
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

NGC 6934

Post by Christopher K. » January 14th, 2011, 12:03 pm

This past September Hubble's Advanced Camera for Surveys captured NGC 6934 with 29 minutes exposure time each for red, blue, orange and near infrared.

This globular contains so many stars that even the thin atmosphere above Mauna Kea blurred them until the 8.1-meter Gemini North scope was installed. Because they are so old, globular clusters almost always lack bright blue stars. Astronomers can gauge a globular cluster's age by measuring how bright the bluest stars are. NGC 6934 is estimated to be 10 billion years old.

Discovered in 1785 by William Herschel, NGC 6934 is 50,000 light years away in the constellations Delphinus the Dolphin, which also houses the twin NGC 7006 about 11° away. It is #47 is Patrick Moore's Caldwell catalog.

Image and more information:
http://www.spacetelescope.org/images/potw1023a/

NOAO infrared image:
http://www.noao.edu/image_gallery/html/im0536.html

Christopher K.
Posts: 4763
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: NGC 6934

Post by Christopher K. » August 28th, 2014, 7:56 pm

NGC lies 2˚57' south-southwest of the G-class, magnitude 5.1 star Kappa Delphini. I haven't investigated its magnitude with any effort, but Starry Night Pro Plus says it is 8.8.

Below are the times during which NGC 6934 reaches its culmination of sixty-seven degrees in the Baton Rouge sky...
13 June = 4:13am
17 June = 3:57am
21 June = 3:41am
25 June = 3:26am
29 June = 3:10am
3 July = 2:54am
7 July = 2:38am
11 July = 2:23am
15 July = 2:07am
19 July = 1:51am
23 July = 1:35am
27 July = 1:20am
31 July = 1:04am
4 August = 12:48am
8 August = 12:33am
12 August = 12:17am
16 August = 11:57pm
20 August = 11:41pm
24 August = 11:26pm
28 August = 11:10pm
1 September = 10:54pm
5 September = 10:39pm
9 September = 10:23pm
13 September = 10:07pm
17 September = 9:51pm
21 September = 9:36pm
25 September = 9:20pm
29 September = 9:04pm
3 October = 8:48pm
7 October = 8:33pm
11 October = 8:17pm
15 October = 8:01pm
All times are Daylight.

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