Gemimi's finest open cluster, visible to the naked eye under good
conditions. Contains 120 stars, 8th magnitude and fainter in an area 30 arc minutes in diameter.
Total magnitude is 5.5 - 2,200 light years distant.
NGC 2158
06hr 07m
+24° 06'
A fainter, compact open cluster, only 4 arc minutes in size.
Located SW of M35, in the same low power field of view. 150 stars, 13th mag. and fainter.
Appears as a smudge in smaller scopes. Physically similar to M35, but 16,000 LY distant.
a Gem (Castor)
07hr 35m
+21° 59'
A double star, separated by 2.3 arc seconds in P.A. 98°.
Castor A shines at mag.2.0, Castor B at mag. 2.9. Castor C, a red dwarf at mag. 9.1 is 72.5 arc
seconds away at P.A. 164°. All 3 components are spectroscopic binaries.
NGC 2129
06hr 01m
+23° 18'
A compact open cluster of 50 stars, SW of M35. 5 arc minutes
in size, magnitude 6.7.
A magnitude 9.1 open cluster, 4.5 arc minutes in size. 35 stars,
magnitudes 11 to 15.
NGC 2420
07hr 38m
+21° 34'
Another 9th magnitude open cluster, 7 arc minutes in size. 30 stars,
magnitudes 10 to 18.
NGC 2339
07hr 08m
+18° 47'
An Sc spiral galaxy, glowing at mag. 12.5 against a rich starfield.
2.0 x 1.4 arc minutes.
NGC 2392!!
07hr 29.2m
+20° 55'
The "Eskimo Nebula" - a bright planetary nebula. 8th magnitude with
a 10th magnitude central star, 40 arc seconds in size. 3000 LY distant, use high power for details. (110NGC)
NGC 2371! and NGC 2372!
07hr 25.6m
+29° 29'
A double lobed planetary nebula, magnitude 12.5. 50 x 30 arc
seconds, with a 12.5 magnitude central star. (110NGC)
(The Twins)
