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NGC 660



NGC 660: Polar-ring Galaxy in Pisces

RA= 1 hr 43 min; Dec = +13 deg 38 min

Date & Site:

Imaged on 10/16/17; Joshua Tree Natl. Park

Conditions: temps in the mid 60's; calm; very good seeing but with fluctuating transparency due to nearby campfires.


Telescope: DSI RC10c 1867 mm at f/7

Guider: SBIG external guide camera with Hutec OAG5

Mount: AP1100 CP3GOTO
Camera: ST-10XME; CFW10; Astrodon LRGB Gen II filters


Exposures: 2 hrs lum (10 min subs), 20 min each RGB (10 min subs) for a total of 3 hrs (insufficient).

NGC 660 is a unique polar-ring galaxy. It is the only such galaxy having, as its host, a "late-type lenticular galaxy". It was probably formed when two galaxies collided a billion years ago. However, it may have first started as a disk galaxy that captured matter from a passing galaxy. This material could have, over time, become "strung out" to form a rotating ring.

FOV = 23 x 15 arc minutes

45 million light years away

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