Sh2-170 in Ha
Posted: Mon Oct 22, 2018 3:44 am
Tonight was washed out with clouds shortly after I began collecting data. I was able to eke out 10 frames of Sh2-170 for a total integration time of 33 minutes. It really needed 2 hours in order to get the noise under control but alas it was not meant to be.
Normally I would not publish a feeble image like this but it is an interesting emission nebula not commonly known. It is in northern Cassiopeia at 65 degrees declination. It currently crosses the meridian at 11pm. If it is not in your catalog, no worries, I will give the coordinates.
Technical Details:
Emission nebula: Sh2-170 (Sharpless Nebulae Catalog)
J2000 coordinates:
RA: 00h 01m 42s
DE: +64d 37m 24s
Size: 20 arcmin
William Optics 71mm f/5.9
Altair 290M camera (uncooled)
Orion 6nm Hydrogen Alpha filter
Unitron Model 142 GEM
Passive tracking with PEC
No active guiding
Gain 389 (1.0 e-/ADU, FWD: 4ke-, Read Noise: 1.38e-)
Offset: 30 ADU
Exposure: 200s
Camera rotation: 5 deg E of N
Ha: 10 frames
Flats: 50 frames
Darks: 45 frames
Bias: 100 frames
Total integration time: 33 minutes
92% waxing gibbous Moon approximately 30 degrees altitude southeast azimuth.
SharpCap 3.1.5219
PIPP 2.5.9
Deep Sky Stacker 3.3.2
StarTools 1.3.5.289
Sorry the image is so small. I applied 4x4 binning in post-processing to help reduce noise.
By the way, the mottled texture of the nebula is real. DuckDuckGo it!
Brian
Normally I would not publish a feeble image like this but it is an interesting emission nebula not commonly known. It is in northern Cassiopeia at 65 degrees declination. It currently crosses the meridian at 11pm. If it is not in your catalog, no worries, I will give the coordinates.
Technical Details:
Emission nebula: Sh2-170 (Sharpless Nebulae Catalog)
J2000 coordinates:
RA: 00h 01m 42s
DE: +64d 37m 24s
Size: 20 arcmin
William Optics 71mm f/5.9
Altair 290M camera (uncooled)
Orion 6nm Hydrogen Alpha filter
Unitron Model 142 GEM
Passive tracking with PEC
No active guiding
Gain 389 (1.0 e-/ADU, FWD: 4ke-, Read Noise: 1.38e-)
Offset: 30 ADU
Exposure: 200s
Camera rotation: 5 deg E of N
Ha: 10 frames
Flats: 50 frames
Darks: 45 frames
Bias: 100 frames
Total integration time: 33 minutes
92% waxing gibbous Moon approximately 30 degrees altitude southeast azimuth.
SharpCap 3.1.5219
PIPP 2.5.9
Deep Sky Stacker 3.3.2
StarTools 1.3.5.289
Sorry the image is so small. I applied 4x4 binning in post-processing to help reduce noise.
By the way, the mottled texture of the nebula is real. DuckDuckGo it!
Brian