Messier 7  -  Ptolemy's Cluster

80%  resolution (11.0MB)

Object identification (11.0MB)

Object data of M7

Object type: Open star cluster (I3r)
Size: 80'
Magnitude: 3.3 mag
Constellation: Sco
Distance: 1,000 Ly
Notes: Messier 7 is an open star cluster in the constellation of Scorpius. At the cluster's estimated distance of 1,000 light years this corresponds to an actual diameter of 25 light years. The age of Messier 7 is around 200 million years.

There are many dark nebulae in the vicinity of M 7, such as:

  • Barnard 283
  • Barnard 287
  • Sandqvist 37
  • BHR 168

Exposure data

Date: 2022-05-25 + 2022-05-26
Location: DeepSkySafaris / Namibia (1,300m)
Telescope: Baader APO 95/560 CaF2 Travel Companion (f=590mm)
Camera: Nikon Z6 (ISO 800)
Mount: Takahashi EM200
Exposure time: 34x6min
Exposure time total: 3h 24min