Saturday, April 21, 2018

More Galaxies

A few recent updates to the rig...  Current imaging setup:

Explore Scientific 127 APO triplet
Explore Scientific 0.7 Focal Reducer / Field Flattener
Moonlite Crayford Focuser 2.5"

Celestron Five Position Skyris Filter Wheel

Losmandy G11GT Mount
Orion short-tube 80 (F/5) for guiding
Orion Starshoot Autoguider (SSAG)
Explore Scientific 50mm finder
Thunderbolt 2 dock
QHY Polemaster polar scope
QHY5IIIM174 (for imaging)
Skyshed

Next purchase:
Narrowing down my selection for a new imaging camera.

Galaxies:

Captured M51 on the evening of 16 April.  One 4 minute exposure, calibrated with 4 minute dark and a bias image.  Missed the opportunity to get flat field images, so I used some old ones for processing, still pretty satisfied with the result for this unguided image.

M51


Another session last night (20-21 April 18) to capture galaxies.  Also unguided, but this time I did record some flat field images:

NGC4535


M94



Also, here is m81 and m82 in a 240 second exposure, also unguided:


Next session will be focused optimizing my guider parameters.  Looking forward to successful imaging longer than four minutes...



PS: a gratuitous waxing crescent moon shot: