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(IAAC) Interacting pair NGC 4490 (Cocoon galaxy), NGC4485 20" Dob.
Observer:N.J.Martin
Your skill:intermediate
Date and UT of observation:Jan 20 1999 05:00UT
Location & latitude:near Ayr South West Scotland lat 55 24'56"
Site classification:bright rural
Limiting magnitude (visual):5 (zenith) sky brightening in the east
Seeing (1 to 10- best to worst):5
Moon up (phase?):no
Instrument:20" f4.4 Dobsonian
Magnification:X180,X250
Filters used:None
Object:NGC 4490 (Cocoon Galaxy), NGC4485
Category: Sc Spiral Galaxy + irregular companion
Constellation:Canes Venatici
Object data:mag9.8 17' X 3.5'
RA/DE: RA 12 30.6' Dec +41 38'
Personal rating A+
Description: Despite the brightening skies the bridge conecting this spiral
galaxy to its interacting companion was clearly visible. The Cocoon is very
oval with a central condensation containing a clearly visible nucleus. There
is an oval appearing central bar curving towards the companion at one end
and at the opposite end curving southward away from the companion.
A very fascinating pair of galaxies with the interaction as obvious as in
the glorious M51; a visit is definitely recommended.
Nick Martin, Bonnyton House, By Ayr, Ayrshire KA6 7EW ,Scotland, UK.
Latitude 55 24'56" Longtitude 4 26' 00".
"Eppur si muove" Galileo Galilei
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