Already posted some but IC1340 was shot July 26.
Equipment: Evolution 8, HyperStar 8, ASIAir Pro, ASI294mc Pro (cooled), Optolong L-Pro
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Posted 28 July 2021 - 07:05 PM
Nice views. Please include gain, exposure, frame count etc.
Posted 29 July 2021 - 12:17 AM
IC1340 was 30 shots @ 8 sec and gain of 120
M8 was 40 shots @ 8 sec and gain of 120
Posted 29 July 2021 - 08:47 AM
First chance in almost a month to get any EAA done last night. I used my AT72EDII reduced to f/4.0, a Lumicon Deep Sky Filter, ASI290MM mini mono, and the new SharpCap Pro 4.0, no binning, 300 gain, on a couple of the easy targets (approx 3 minute total exposure on each) with the 75% moon very low in the sky:
M8; 19 x 10s
Posted 29 July 2021 - 01:16 PM
Whew, we finally got a semi-clear night here in the northeast. The Lagoon and Trifid nebulae are real low here and I just managed to observe them both last night. I was surprised when my mount finished its slew on the first nebula and I saw the scope was pointing nearly horizontal between the corner of my house and a large bush. It was also just barely over our neighbor's roof down the hill to the south.
Anyway, these views are my best attempt for such low objects in SQM 18.25 skies in a Bortle 8 region. The skies here have not be very clear all summer so we take what we can get. I'm heading to Wyoming in a week or so where dark skies abound....but wait.... except for the smoke from the fires in CA, OR and ID. How long will astronomy survive the onslaught of a changing climate....
After these two observations, I waited patiently for the Lion and the Wizard to clear my roofline to the north. At about 1:00, I slewed to the Lion and was delighted to see it appear onscreen...but only briefly, before an un-noticed cloud bank moved in and obscured my entire available sky. Heh, at least I got to get some sleep.
M8 The Lagoon Nebula : 21 frames/ 8 secs/ 425 gain/ L-eNhance filter/ Darks and Flats
M20 The Trifid Nebula: 57 frames/ 8 secs/ 425 gain/ L-eNhance filter/ Darks only
Posted 30 July 2021 - 06:30 PM
7/28 finally a clearing in northern Vermont skies of clouds, smoke, and jet stream, but not the moon. Only the 4th observing night this summer.
Images by ASI294mc Pro through Astronomik's L-3 UV-IR filter using a 222/f5.8 Newtonian. 4k capture down converted by scope NUC pc (native 4k resolution) due to wireless Windows desktop connection to control room 2-in-1 tablet PC driving a 4k UHD monitor at 1920x1080. Windows screen capture (Print Screen jpg) from monitor of SharpCap Pro 3.2 Live Stack. Windows Paint (2nd jpg) cropped out displayed observing GUIs leaving nearly full camera frame. No 'darks' or 'flats' only SharpCap "Auto Color Balance" and "Auto Stretch"(s). Guiding seemed worse then usual. Bortle class 4 skies (lightpollutionmap) under 'below average' Transmissibility and 'above average' Seeing (astrospheric). Some personal bests here.
M8 3-minutes with 15-12s frames, 225 gain, no offset, 5C camera temp. PHD2 RA guiding 0.70(0.66") 11:55pm
M20 7:36 minutes with 38-12s frames, 225 gain, no offset, 5C camera temp. PHD2 RA guiding 1.29(1.21") 11:38pm
Posted 30 July 2021 - 08:05 PM
July challenge was good for me as I was able to capture several objects up country otherwise to low on my horizon.
NGC6888 3-minutes with 30-6s frames, 325 gain, no offset, 10C camera temp. PHD2 RA guiding 1.99(1.87") 10:23pm
Posted 31 July 2021 - 09:47 AM
IC 1340 second attempt
314 x 4 secs, 6
ASI 294MC pro -10 C
SW 14 inch goto Dobson
Omegon City Lights Filter
25 x darks
Stacked and preprocessed in SharpCap4
Sharpcap 4 Display Stretch image cropped, flipped and converted to JPG before uploading.
I´ve included a tiny thumbnail of the original PNG to show how little rotation artefact (and tracking drift) I had after 20 mins. I only needed to crop top and left side about 5-10%. Scope was pointing due East at 91 deg (55 alt. ). This phenom explained here https://calgary.rasc...ld_rotation.htm
Also saved this as a FITS 16 bit stack and raw frames - will try and see if I can improve with processing
Edited by Mikehuerto, 31 July 2021 - 10:10 AM.
Posted 31 July 2021 - 12:22 PM
In Boston last night, we had a pretty 'ok' night until near sunrise when I 'called it' for the night - SQM read between 18.50 and 18.90 over the night - a record it seems. Its a pretty sad record though when you hear about the folks in Oregon high country who don't both observing if the SQM reads less than 20.00. Anyway, I tested out guiding the newish CEM70G and had some fun working to observe Sh2-132(Lion Nebula) and NGC 7380 (Wizard Nebula) - the only remaining July Challenge objects I can observe from my location.
Both Images below were observed with an 203mm (8") TS F4.0 Newtonian with an ASI294 MC camera. Optolong L-eNhance filter helped out.
Wizard Nebula (NGC 7380) : 10 sec exposures/ 425 gain/ darks and flats applied live
What an amazing star field...! This was cropped but the FOV of my setup is 82' x 56'
Edited by GaryShaw, 31 July 2021 - 12:39 PM.
Posted 31 July 2021 - 12:29 PM
Lion Nebula (Sh2-132) : 10 sec exposures/ 425 gain/ darks and flats applied live
This one was pretty hard for me. Same gear and camera settings as the Wizard but not nearly as clear a view of the details - I'm clearly not the 'master of the histogram' that some of you all are. It was a struggle to get this decent of an image. I'm thinking my flat was not working optimally so each time I tried to bring out more of the nebulosity details, the vignetting slapped me in the eyes. This astronomy stuff sure takes learning time and ..... patience. This was cropped but the FOV of my setup is 82' x 56'
PS: I can't wait to try Sharpcap 4.xx -especially the 'Background Subtraction' feature.
PS-PS: Thanks very much Errol for organizing this months Challenge
Edited by GaryShaw, 31 July 2021 - 12:40 PM.
Posted 31 July 2021 - 09:02 PM
seems there were alot of us out in the northeast with the nice skies looking for the southern targets. I went after M8 and M20 as about the southern most things i can see reliably, and even then have to wait for them to get to a gap in the trees.
C5, 0.63 reducer, Starsweeper reducer, Mars-C (IMX462) riding the AZGTi.
i made more changes to my setup to include a filter switch so i can more easily play with some of my filters on the camera. so my spacing has changed and seems to have increased the reduction in my setup. I also mucked up the collimation....but still having fun.
Removed the UV/IR and added a low pass filter, I need to verify the wavelengh cutoff somewhere in the 600s. It passes deep red and IR. even though this isn't really an astronomy filter, it did a nice job compared to the shot I tried with no filter. I have the impression that finding the right filter will make all the difference in my light polluted skies.
M8 28xmixture of 8 and 15s, gain 250 focus was off and did have an appropriate flat with the filter yet.
M20 20x15s gt this one focused better, but it looked better before i messed up the histogram right as it was saving...
Posted 31 July 2021 - 09:56 PM
Date/Time: July 30th 10PM-1AM
Location: Bortle ~5 Driveway MA,
Scope: Bresser 208mm F3.9 with SW Quattro coma Corrector, UVIR filter
Camera: ASI294MC-Pro, 370Gain, 0°C, FOV 1.35°x0.92° @ 1.18"/px
Software: SharpCap for Darks, Flats, Livestacking and Stretching, RAWTherapee for cropping and resizing
System: Beelink X55 J5005 8GB mini PC with remote desktop over dedicated WiFi
Unfortunately trees block my view to a lot of the great southern and western objects. Here is what I was able to see.
M29 8.0s X 19 = 152s
Looks like a diffuse dark nebula to the east, but it is not in any of my catalogs.
IC1340 8.0s X 53 = 424s
It's upside down in this north-up FOV, but I could definitely make out the spooky shape of a bat in flight. It's not bad contrast for just a UV-IR filter, and I like how it shows the star colors.
NGC6888 8.0s X 48 = 384s
Loads of stars without a narrowband filter, but stars are striking in their own way.
NGC7380 8.0s X 74 = 592s
Very pretty, it turned out better than I thought it would. With the broadband I think I can see a hint of reflection nebula(maybe?).
Sh2-132 8.0s X 51 =408s
This one really fell down without a more selective filter. On the plus side, I can see B369, a dark nebula to the west of Sh2-132, and the variety of star color across the field is lovely.
Thanks for the great list of targets for this months challenge.
Edited by cmooney91, 31 July 2021 - 10:03 PM.
Posted 01 August 2021 - 06:55 AM
Thank you to everyone that tried the challenge this month.
Posted 01 August 2021 - 09:35 AM
Thank you to everyone that tried the challenge this month.
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