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Astr111 Photography Projects, Fall 2009

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NGC 2419, Claire Wilson

NGC2419

A globular cluster is a multitude of stars with a common origin held together in mutual gravity. There are roughly 200 globular clusters in the galaxy located in the halo and nuclear bulge. They range in size anywhere from 50 to 450 light years. Out of the 10⁴ to 10⁶ stars in a globular cluster, the brightest star is red in color. The luminosity of a cluster also varies anywhere from 10⁴ to 10⁶ Lsun units. The globular cluster NGC 2419 is referred to as the "Intergalactic Wanderer" due to its range from the Large Megallanic Cloud, and is 300,000 light-years away. NGC 2419 is naturally bright (NGC 2419 ranks fourth in intrinsic brightness of our galaxy's globular clusters), but seems dim with a visual brightness of 10.4 (mag) because of its distance from the earth. It is even thought that this globular cluster actually originated outside of our galaxy and migrated inward, but this theory is difficult to determine, again, because of its distance.

In the above image, a pack of stars is seen gathered tightly in the center of this image of NGC 2419, the "Intergalactic Wanderer". NGC 2419 is visually brighter in the center of the globular cluster and a faint red color can be detected amongst the more vivid stars. The red emmitted makes references to the cluster's mature age. The apparent linear size of the "Intergalactic Wanderer" is 74 light years.

References:

Darling, David. "Intergalactic Wanderer (NGC 2419)." The Internet Encyclopedia of Science. <http://www.daviddarling.info/encyclopedia/I/Intergalactic_Wanderer.html>

Franknoi, Andrew, David Morrison, and Sidney Wolff. Voyages through the Universe. 3rd ed. Canada: Brooks/Cole - Thomson Learning, 2004.

Frommert, Hartmut and Kronberg, Christine. "NGC 2419." Students for the Exploration and Development of Space. <http://www.seds.org/messier/xtra/ngc/n2419.html>

Frommert, Hartmut and Kronberg, Christine. "Globular Star Clusters." Students for the Exploration and Development of Space. <http://www.maa.clell.de/Messier/glob.html>

Hammar, Richard. "Globular Cluster NGC 2419." Astronomy Picture of the Day.<http://antwrp.gsfc.nasa.gov/apod/ap090123.html>

Right Ascension (J2000) 07:38:06
Declination (J2000) 38:53:00
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 5x60 seconds in C, 300 seconds in BVR
Date observed

November 8, 2009