Deep Sky Object in Spring
M67(Open Cluster in Cancer)


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Date & Time: Nov 20 2020, from 25:39 to 26:21 JST(+0900)
Composed 6 shots with 8 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor with conversion lens (f=700mm, F5.6)
Auto-guided with VIXEN ATLUX Equatorial & ZWO ASI174MC + PHD2
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO800



M67 (NGC2682) / Open Cluster, type f, II 3 r
R.A.08h 50m 24.0s (2000.0)
Dec.+11° 49' 00" (2000.0)
Apparent Size15.0'
Real Size12 light yrs.
# of Stars200
Magnitude6.1
Distance2700 light yrs.
M67 (NGC2682) is an open cluster about 9 degrees south-east of the Praesepe (M44), with a diameter of 15 arc minutes. The cluster is positioned just 2 degrees west of alpha Canicri, so it should be easy to find the figure like a nebula with binoculars. You can appreciate the individual stars with a telescope over 6cm (2.4"), plenty of faint stars with magnitude about 11 to 13 are scattered like gold dust, and detectable that the whole of shape is like a hemisphere.
M67 consists of about 200 stars, and they're over ten billion years old. Distance from the solar system is estimated about 2700 light years.




M48

Mel.111


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