Globular Cluster

Captured by Md. Shahadat Hossain Shahal

Astrophotography information

Astrophotography Sohanur Rahman
Observing location Saint Martin (21 North 92 East)
Exposure time 92 Seconds
Telescope Unistellar eQuinox 1 (Ashwin 1)
Camera Sony IMX224, 1.27 MPX
Field of view (resolution) 0.61° x 0.46° (1.72 arcsec/pixel)
Image processing Md Shahadat Hossain Shahal
Image processing method 1. Stack
2. Background extraction
3. Plate solve
4. SPCC
5. Star removal
5. Stretching
7. Star re-composition
8. Denoising
9. Sharpening
10. HDR processing for galaxy core.
11. Masked stretching.

Astrophysical information

Object type Globular cluster
Constellation Ophiuchus
Distance ~ 25,800 ly
Angular size ~ 9.8 arcminutes
Physical size ~ 90 ly
Apparent magnitude 7.7