Hemisphere:  Northern  ·  Contains:  Merope nebula  ·  NGC 1435  ·  The star Merope (23Tau)
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Merope Nebula, 


            John Michael Bell...
Merope Nebula
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Technical card

Imaging telescopes or lenses: Orion 8" f/3.9 Newtonian Astrograph

Imaging cameras: ZWO ASI 178MC-Cool

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Astromania 60mm Guidescope

Guiding cameras: ZWO ASI 120 MC-S

Focal reducers: Baader Mark-III MPCC Coma Corrector

Software: Gradient Exterminator GradientXTerminator  ·  Adobe Phosotshop CC 2018  ·  Stellarium  ·  DeepSkyStacker  ·  PHD2 PHD 2.6.5  ·  PPIP v2.5.4  ·  STARIZONA PS ACTION SET  ·  Russell Croman Star Shrink  ·  ZWO Designs ASICAP  ·  REGISTAX 6

Filters: Optolong 2" L pro

Accessory: Telrad Finder

Dates:Oct. 6, 2019

Frames:Optolong 2" L pro: 101x120" (gain: 100.00) -15C bin 1x1

Integration: 3.4 hours

Darks: ~25

Flats: ~30

Bias: ~300

Avg. Moon age: 8.12 days

Avg. Moon phase: 57.84%

Bortle Dark-Sky Scale: 5.00

Basic astrometry details

Astrometry.net job: 2972340

RA center: 3h 46' 9"

DEC center: +23° 54' 14"

Pixel scale: 0.274 arcsec/pixel

Orientation: 100.095 degrees

Field radius: 0.283 degrees

Resolution: 1824x1368

Locations: Backyard, Tucson, Arizona, United States

Data source: Backyard


Good Morning fellow APs! So I am in an exceptionally good mood today as it was one of those morning where you wake up, check your data, and everything ran according to plan for the entire night. I also tried something different as I ONLY shot ONE target... crazy I know. I had been trying to get a decent image of Merope for a long time now and my subs were always plague with moon light pollution/gradients, clouds, poor guiding, and poor focus. Every attempt to process what I had never made it far. So last night I kept my scope pointed at the Pleiades. The result was over 150 2 min subs, I filtered out 40 of them myself due to small clouds and satellites, then let DDS filter out another 10%. I was left with 101 subs which stacked nicely. So here is an initial process of the data. I intend to take a much more extensive pass at it today.

FOLLOW ME ON INSTAGRAM!!! I AM MAKING A SWITCH TO SHOWING MY WORK MORE ON IG. I have many more pics of my rigs and other things related to AP. Also, being a teacher I always try to include a short, related lesson with each image post. I find that IG has a much wider audience and is an excellent platform for outreach.

>>>>>> https://www.instagram.com/astroimaging_by_johnnyb/ <<<<<<<<<

QUESTION: So I cannot for the life of me figure out what is causing that fifth offset spike on Merope. I checked inside the scope, throughout the imaging train, and there were no objects obstructing my view. Anyone know what is causing this?



John Michael Bell...
License: Attribution Creative Commons

Sky plot

Sky plot


Merope Nebula, 


            John Michael Bell...