C105
Globular Cluster in Musca
About
NGC 4833, a globular cluster in Musca about 21,500 light-years away. Lacaille found it in 1751–1752 during his trip to South Africa. It sits near the Coalsack and is partly dimmed by dust in the galactic plane.
Imaging tips
- At 2890–4810 mm on APS-C the cluster fills a third to half of the frame. On full frame it is too small to frame: use a long focal length and a fine pixel scale.
- It sits in a dusty region. One 7-hour set combined 5 × 15 min of luminance with 23 × 15 min of RGB.
- A bright foreground star of our own galaxy appears at the upper left of a 37′ frame.
- Best in March and April, but it never rises from 35°N or 50°N: a southern-hemisphere target.
Facts
- Size
- 8.4′
- Magnitude
- 6.9
- Coordinates
- RA 12h 59.6m, Dec −70° 53′
- Framing, APS-C
- 2890–4810 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Mar, Apr
- Peak altitude
- never rises from 50°N, never rises from 35°N