LRGB image
NGC 6939 (cropped)
NGC 6946 (cropped)
Target Information
- ALTERNATIVE DESIGNATION(S):
- NGC 6939 (right): Collinder 423, Melotte 231
- NGC 6946 (left): Fireworks galaxy, Arp 29
- TYPE:
- NGC 6939: open cluster
- NGC 6946: spiral galaxy
- CONSTELLATION:
- NGC 6939: Cepheus
- NGC 6946: Cygnus
- DISTANCE:
- NGC 6939: ~4,ooo light years
- NGC 6946: ~22.5 million light years
Imaging Information
- IMAGING DATE(S): September 2016
- L: 10 min subs x 17, Bin 1×1
- R: 10 min subs x 12, Bin 2×2
- G: 10 min subs x 11, Bin 2×2
- B: 10 min subs x 10, Bin 2×2
- TOTAL EXPOSURE TIME: 335 mins = 5.6 hrs
Equipment
- TELESCOPE: Takahashi TOA-130F
- MOUNT: Software Bisque Paramount ME
- CAMERA: SBIG STL-11000XM
- GUIDING: TC-237 (internal autoguide chip)
- FILTERS: Astrodon
- IMAGE ACQUISITION SOFTWARE: TheSkyX, CCDAP5, FocusMax V4
- PROCESSING SOFTWARE: PixInsight