Quote:
Originally Posted by ballaratdragons
Great work Dennis!
E & F are plainly visible 
On your original image can you see G & H?
I used to love imaging the trap  |
Hi Ken
Thanks! I re-visited the Lum frame and after digging around in the bowels of the data, I think that I found G, H1, H2 and I as well. I re-sampled the data upwards to dig these faint fellas out and I think that they are real stars and not processing artefacts.
An impressive feat for the Tak 180 F12 at prime focus (2160mm). I didn’t get much of an opportunity to assess the seeing due to the clouds, but I suspect it must have been very good to resolve these details in a 5 sec exposure.
Here are some data from SkyTools describing this multiple star system:
Theta 1 Ori, Multiple Star System, Magnitude: 5.13
AB: 5.13+6.35 mag, In 1991: PA 312° Sep 12.87"
AC: 5.13+7.2 mag, PA 56° Sep 13.12"
AD: 5.13+7.49 mag, PA 342° Sep 16.87"
AE: 5.13+6.4 mag, PA 134° Sep 135.30"
EF: 6.4+7.5 mag, PA 92° Sep 52.50"
EG: 6.4+9.1 mag, PA 97° Sep 128.70"
BH: 6.35+11.1 mag, Sep 4.10"
AI: 5.13+11.5 mag, PA 122° Sep 4.00"
Cheers
Dennis