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NGC 925 Galaxy in Triangulum , 





    
        

            AlBroxton

NGC 925 Galaxy in Triangulum

Technical card

Imaging telescope or lens:Celestron C11 Celestron

Imaging camera:40D Canon

Mount:CGEM Celestron

Guiding telescope or lens:80mm EON Orion

Guiding camera:Orion Star Shooter

Focal reducer:6.3 reducer Celestron

Software:Noel's Tools

Resolution: 850x531

Dates:Nov. 17, 2011

Frames: 24x90"

Integration: 0.6 hours

Avg. Moon age: 21.01 days

Avg. Moon phase: 62.01%

Astrometry.net job: 601268

Locations: Leesburg home, Leesburg , Florida, United States

Description

NGC925 was discovered (Sep 13, 1784) by William Herschel. NGC925 is a nearly face-on spiral galaxy in Triangulum. This galaxy is part of the Hubble Space Telescope Key Project on the Extragalactic Distance Scale, a long-term project dedicated to determining the Hubble constant to within +/- 10% using Cepheid variable stars as distance indicators. The Hubble constant defines the relationship between the distance of a galaxy and its recession velocity due to the expansion of the Universe.  Knowing this relationship more precisely will give us a more accurate measure of the age of the Universe. NGC 925 lies relatively nearby, with a redshift of z=0.0019, corresponding to a recession velocity of 550 km/sec.  Visually, NGC925 appears as a large, fuzzy oval with a gradual brightening toward the center.
Observation notes :   In my 18-inch at 250x I had difficulty getting a handle on the orientation of the brighter elongated central region and I observed a curious effect of the eye.  As I moved my eye about the field testing different averted vision positions the central area actually appeared to "flip."
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Author

AlBroxton
AlBroxton
License: None (All rights reserved)
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NGC 925 Galaxy in Triangulum , 





    
        

            AlBroxton