Deep Sky Object in Spring
NGC3642 (Galaxy in Ursa Major)


Date & Time: Dec 28 2024, from 26:11 to 27:05 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(2040×2040)
Device Size...10×10mm
Sensitivity...ISO4000, White Balance...Daylight


NGC3642 / Galaxy, type SA(r)bc:
R.A.11h 22m 17.7s (2000.0)
Dec.+59°04' 27" (2000.0)
Apparent Size5.3×4.4'
Radial Velocity+1623km/s
Magnitude11.7
Distance90 million light yrs.
Group of GalaxiesNGC3642 Group
Other IDsUGC 6385, CGCG 291-62
MCG +10-16-128, PGC 34889
IRAS 11194+5920
This image shows you a medium-sized face-on galaxy with 11th magnitude in brightness and 5 arc minutes in apparent diameter positioned in the Big Dipper of the constellation of Ursa Major. You can see a bright nucleus and surrounding unevolved arms. The galaxy is forming a small-scaled galaxy group with compact galaxies, about 90 million light years away.



NGC3631
NGC3675

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