Deep Sky Object in Spring
Intergalactic Wanderer(NGC2419 in Lynx)

Date & Time: Jan 27 2007, from 28:08 to 23:22 JST(+0900)
Composed 4shots with 4 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain (f=2500mm, F10.0)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D70 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1250

NGC2419 / Globular Cluster, type II
R.A.07h 38m 5.9s (2000.0)
Dec.+38° 53' 00" (2000.0)
Apparent Size4.1'
Real Size350 light yrs.
Distance300,000 light yrs.
A compact globular cluster positioned in southwest edge of Lynx is NGC2419. This field is equivalent squeezed by three constellations of Lynx, Gemini and Auriga, it can hardly be found out good guide star around here. You can catch the cluster by tracing your scope about 7 degrees north from Castor in Gemini. This image shows you that two stars with 7th and 8th magnitude are paralleling with the cluster about 3 arc minutes in interval.
This globular cluster has no striking features, having an apparent size of 4 arc minutes or so and 10th magnitude, but the cluster has a nickname of "Intergalactic Wanderer", Actually it's estimated that NGC2419 is surprisingly about 300 thousand light years away, this distance is farther than the Magellanic Clouds. It's considered that the cluster is positioned near limit of gravitational sphere of the Galaxy, and it can be regarded that the cluster is floating in the empty space solitarily without belonging to any galaxies. Of course NGC2419 is the most distant one in all globular clusters discovered till now.



Copyright(c) 2007 by Naoyuki Kurita, All rights reserved.
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