Cr107
Open Cluster in Monoceros
About
A large, loose open cluster in Monoceros, roughly 5,300 light-years away. SIMBAD gives its width as 46.8′ and its visual magnitude as 5.1. It lies about 1° south of Collinder 106.
Imaging tips
- At 46.8′ across, it needs a field wider than 0.8°: use a short focal length or a wide lens.
- Collinder 106 is about 1° to the north, so a wider field of around 2° would hold both clusters.
- Broadband is the right choice for an open cluster; the stars are the subject.
- Best placed from December to January; it peaks near 45° altitude from 50°N.
Facts
- Size
- 46.8′
- Magnitude
- 5.1
- Coordinates
- RA 6h 36.8m, Dec +4° 58′
- Framing, APS-C
- 520–860 mm
- Framing, full frame
- 790–1320 mm
- Best months
- Jan, Dec
- Peak altitude
- 45° from 50°N, 60° from 35°N