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Posts posted by MilwaukeeLion
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Terrific meteor captures, never seen anyone plot them like that. Fantastic.
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Great meteor images. What a beauty captured in 6th image, bright meteor with spear point end. Very cool !
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Hope to see some captures by SGL members. Was complete cloud by me with possibly partly cloudy after 2am...work week so didn't bother.
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Neptune and Uranus looking good right now oppositions fast approaching.
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Nice meteor capture, looks like Perseid and satellite. A Pedialyte - good for hangovers too.
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Crater Alphonsus - just NW of the peak is where Ranger 9 spacecraft was purposely impacted into moon to send high res images back from its six cameras and was broadcast live for millions to watch in 1965. I recommend watching the video of Ranger 9 crash on its wiki page if not viewed. Performance was flawless, its final image was mere twelve inches above lunar surface before impact @ 9612 kph. Alphonsus was also a primary backup landing site for Apollo 16 & 17 missions.
c11-2.5x barlow-asi120mm, 200 best frames stacked in AS3.
Clear skies !
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Very cool capture of ISS transit.
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Ultra mini 30mm guide scope, 130mm FL, F4.3, 570 seconds integration. Was guiding m31 with asi120mm - DSLR imaging. Surprised what mini guide scope was picking up even in PHD2. While taking dark frames switched to sharpcap see photons guide scope could gather. Impressed with detail in dust lanes from such tiny amount of aperture. Second image is example of single frame I was enjoying watching stretch & stack.
Stack is 19 x 30 sec frames, gain 22, 12 bit, 1280x960 png, live stack sharpcap.
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1 minute ago, Davey-T said:
I get a few of those need to hire a boat, bit tricky levelling the mount though 😂
Dave
Yes, waves and current must be accounted for to pull this one off.
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Wrath of Khan was on this afternoon, had to watch. Can't find Mutara nebula in Stellarium? Would like to image.
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Outstanding capture, GRS and a moon to boot.
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9 minutes ago, vlaiv said:
I would say FITS as it is standard astro interchange format - so most software should handle it properly.
Bit depth depends on "stage" and camera used (format of capture). Initial subs should be 16bit (unless for some reason you opted for 8bit format - but then better be sure you know what you are doing), and every stage after that should be at least 32bit.
I say at least 32bit because most software does not support double precision, but in due time we will see more and more software starting to support it if CMOS sensors, and particularly low read noise CMOS sensors continue hitting the market - then it will be feasible to have thousands of subs and that many subs require higher precision than can be provided by 32bit float point.
32bit integer will actually store greater precision than 32bit float point, but not many software supports this type of format, and one needs to be careful when coding support for it - most operations will require usage of long integers (64 bits) and scale back results to 32bit for storage. Ok, this is maybe a bit more info than needed use 32bit float precision for everything except captured subs and you will be fine for the time being.
No this is good info because im bouncing images between 3 programs, (PI - Nebulocity - Straton star removal). Easy to recombine starless image with stars only or combine 2 final results using stars or non stellar align in Neb. All handle fits but result out of Stratton is reduced by half size. From say 35 mb fits going in to 17 mb fits coming out. Am I losing valuable info using Straton as opposed to taking the long route and removing stars manually?
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Was testing different camera settings last week on few objects. Below 15 subs - 120 sec - iso 3200 combined with 8 subs - 180 sec - iso 1600. doz each flats, bias, darks. mod DSLR, 80mm refractor.
Does this workflow make sense?
1. Batch processed both in PI - combined two final images
2. Separated RGB channels in PI - removed stars from each channel.
3. Recombined starless channels - stretched image.
4. Recombined stars only channels - combined with stretched starless image & binned.
5. Messed about in PS.
Stars not bloated compared to my standard processing. Having hard time figuring out how should be saving images while working on them. Any suggestions? Work with fits or XIFS or tiff, 32 bit, 16 bit, free floating, integer, so many options.
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Andromeda last night. DSLR, 80mm refractor, iso 1600, 120 sec x 30 subs, 22 darks, 25 bias, 21 flats, processed in PI. Seeing good, temp cool, some dew.
G11 prefers heavy scope, always a pain guiding light setup. Read about some tying weight with rope help keep RA engaged, may try it next time.
Image below uncropped - binned result. New to PI prob made some mistakes. Few hot pixels in red made it through, large stars brighter on one side than other and flats missed a dust bunny unsure why on all of above.
One of better images ive taken in awhile flaws and all. Got some data on N.A, & Pelican nebulas need to process.
Clear skies!
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Dusted off hyperstar for little viewing last night. Started night with Iris nebula, mount was behaving strangely, knew I was polar aligned well. Tracking lunar speed for Iris captures. With that solved, slewed to one of my favorites Stephan's Quintet with Deer Lick Group in frame. Got some nice details from even smallest of galaxies before moon rise. Was planning on packing it in before the moon but M31 was just rising above trees. Not viewed Andromeda in some time, never disappoints but missed out on detail. This camera not suited for moon lit nights, should've gone mono. Below few small stacks and some single frames given some stretching. Clear skies..
C11 - atik Infinity - hyperstar
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Brilliant capture Dave, needs to be added to contest. Your crater id's are spot on.
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Noticed small group of sun spots in first few images Sony a6 - Omni 102 XLT - Baader prism. Nice to see features in WL or GL more like. Never tried color camera with prism, liked green tone so left as is. Little sharpening and crop in PS.
Comfortable this morning, finally dropped 90s to 70s f. A test of EQS after thorough cleaning / lube job / bolt adjustments. Like quick setup - packs light for travel.
Clear skies!
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Meade Coronado EQS works well. Weighs in at 16 lbs. Comes with 8.5 lb counter weight, battery operated clock drive and manual slow tracking controls. I use it with 3 scopes, PST for solar, ED80 for lunar & solar and Omni XLT 102 for lunar, solar, planets. Images below are from this morning, supposed to only handle 5 lbs of scope weight max. With the 102 on it plus wedge & camera I have 13 lbs on it plus 8.5 lb counter weight. Tracks all day/night long. On 4 D batteries have nearly 24 hrs on it running. Still haven't changed batteries.
I did a little work to improve performance. Took apart removed factory grease, applied new grease. Adjusted tension on dec & ra bolts. Adjusted worm gear alignment.
ISS solar transit
in Imaging - Solar
Posted
Awesome job with capture and processing, nice detail on panels in there.