Search found 793 matches
- Tue Dec 15, 2020 3:18 pm
- Forum: General Discussions
- Topic: Optimizing sharpness with SNR. DSO "lucky" imaging ?
- Replies: 6
- Views: 239
Re: Optimizing sharpness with SNR. DSO "lucky" imaging ?
Tim, I've held off from replying due to the word "DSO" in the title, but now that I see that the topic has shifted towards imaging stars, I can add something to the discussion. Feel free to use sub one-second exposures for the Lyra double-double. They are bright at 6th magnitude. If you ha...
- Mon Dec 07, 2020 6:36 am
- Forum: How do I?
- Topic: Multistar FWHM and full-Moon sky brightness
- Replies: 9
- Views: 351
Re: Multistar FWHM and full-Moon sky brightness
Anthony, I know that some people swear by Bahtinov Masks, but I stopped using mine for two reasons: you need a bright star, and you risk accidental loss of PA putting it on and taking it off if you bump the tripod/mount. Also, I focus often, after slewing to a new object and after a filter change. I...
- Sat Dec 05, 2020 5:10 pm
- Forum: How do I?
- Topic: How do I (can I) use SC to test ASI294 linearity
- Replies: 15
- Views: 502
Re: How do I (can I) use SC to test ASI294 linearity
Gary, I recognize the document in the screenshot of your original post: AAVSO's CCD Photometry Guide. I agree with Robin. You need a very stable light source. I tried an Electroluminescent Panel but found that the brightness varied. I ended up using an LCD monitor. I've attached results for a run at...
- Sat Dec 05, 2020 12:38 am
- Forum: Gallery
- Topic: Guess the name of this large Lunar Crater with its central peak?
- Replies: 1
- Views: 230
Re: Guess the name of this large Lunar Crater with its central peak?
PYTHAGORAS
Geological period: Eratosthenian (From -3.2 billions years to -1.1 billions years)
Dimension: 129.0x129.0Km / 78.0x78.0Mi
Height: 4800.0' / 14500.0ft
Virtual Moon Atlas says that it is in the northwest quadrant, not southwest.
What do I win?
BTW, decent photo
Brian
Geological period: Eratosthenian (From -3.2 billions years to -1.1 billions years)
Dimension: 129.0x129.0Km / 78.0x78.0Mi
Height: 4800.0' / 14500.0ft
Virtual Moon Atlas says that it is in the northwest quadrant, not southwest.
What do I win?
BTW, decent photo

Brian
- Mon Nov 30, 2020 4:09 pm
- Forum: Gallery
- Topic: An Oldie but Goodie: NGC7635 The Bubble Nebula
- Replies: 6
- Views: 261
Re: An Oldie but Goodie: NGC7635 The Bubble Nebula
Hi Bruce, Awesome image! For inspiration (and humiliation) I visit Sara Wager's website. Here is her rendition of the Bubble: https://www.swagastro.com/ngc7635.html Astro-Physics' website also shows a cyan bubble: https://www.astro-physics.com/ She did not specify, but I believe it is SHO. Plenty of...
- Sun Nov 29, 2020 2:17 am
- Forum: Gallery
- Topic: Open Star Cluster M34 using a Newtonian Mask
- Replies: 7
- Views: 708
Re: Open Star Cluster M34 using a Newtonian Mask
Tim, That is a tight FOV! You've got good star color. It is amazing what CMOS cameras can do with such short exposures. On the positive side, your FOV would be great for galaxies. M81 Bode's Galaxy will be coming around soon. Give it a try. Here is mine from a year ago. I used Bin 1 for luminance, a...
- Sat Nov 28, 2020 5:55 am
- Forum: Gallery
- Topic: Open Star Cluster M34 using a Newtonian Mask
- Replies: 7
- Views: 708
Re: Open Star Cluster M34 using a Newtonian Mask
Hi Tim, Thank you for your reply! Great questions. The Newtonian Mask adds visual interest. I have a refractor. Refractors render stars as round discs due to the clear, unobstructed path provided by the lens system. Newtonian reflectors utilize two mirrors. The primary mirror gathers starlight, and ...
- Wed Nov 25, 2020 9:46 pm
- Forum: Scripting
- Topic: My BATCH Script
- Replies: 9
- Views: 518
Re: My BATCH Script
Hi Robin,
'import socket' works for me, but I am running SharpCap 3.1, second to last patch.
Brian
'import socket' works for me, but I am running SharpCap 3.1, second to last patch.
Brian
- Wed Nov 25, 2020 11:16 am
- Forum: Scripting
- Topic: My BATCH Script
- Replies: 9
- Views: 518
Re: My BATCH Script
Jesus,
I enjoyed reading your code. Very well-structured, and makes maximal use of the Windows Forms library.
Thanks,
Brian
I enjoyed reading your code. Very well-structured, and makes maximal use of the Windows Forms library.
Thanks,
Brian
- Sun Nov 22, 2020 8:32 pm
- Forum: Gallery
- Topic: Perseus Double Cluster and NGC 1664
- Replies: 1
- Views: 208
Re: Perseus Double Cluster and NGC 1664
One last iteration...
I think I'm going with this going forward.
Brian
I think I'm going with this going forward.
Brian