NGC772 is a disturbed spiral-galaxy in the constellation of Aries.Sized 7,2′ × 4,3′ with an apparent magnitude of 10.2mag it would have been an easy object to be found by Charles Messier during his searches for new comets.
But he overlooked it and so it was officially first seen by William Herschel in 1784.
Its real distance of 100 mio.light-years unveils its size to be twice that of our own milky-way.
It has a bright compagnion a bit to the south:NGC770,which strongly interacts with NGC772 and probably has caused the one disturbed bright arm of the main galaxy and also much of the intergalactic cirrus to be detected in the negative contrast-enhanced picture down at this page.
This arm is much brighter than the other one and includes many starburst areas
Halton Arp named NGC 772 in his Atlas of Peculiar Galaxies as Arp 78.
RA.: 01h 59m 19,6s
Decl.: +19° 00′ 27″
LRGB image with L = 25x1200s, RGB = 9x1200s each,a total of 17.3 hours
80cm f/7 AstroOptik Keller corrected cassegrain FLI Proline 16803 Astrodon LRGB Gen-II filters
Prompt 7 CTIO/UNC Chile,remote controlled
image processing: Bernd Flach-Wilken
this picture of NGC772 shows 83% of the FOV (18.2´x18.2´) of the used camera.Noth is upside
For a high-resolution picture click here
this is a more detailed version:
in this negative image you can detect the remnants of the intergalactic cirrus caused by the tidal interaction with the galaxy NGC770 south of NGC772: