Dear forum, I did first light on my new refractor (Takahashi FSQ-106edx4, camera ZWO asi294mm, Baader Ha 7nm filter). I have a lot of issues still (late nights, a lot of other things) with focuser and also auto-guiding, so no final image yet  But first few images were 5-minute subs with hydrogen alpha on Pelican Nebula. I am quite happy with them (not other filters and full project yet, quite defocused etc etc ). But I am wondering if forum would know what is happening on 2nd sub. There is additional star that is not there on 1st, 3rd or any other out of 18 frames I did in that hour and half:  I hope it is visible, it stuck out quite obviously when I did blink in PixInsight. One can see normal satellite trails but this star is there only for 1 5-minute sub. Any idea what could it be? Zoomed in picture shows the star is a little bit deformed (in the frame with other lower bright star for comparison):  |
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
I’ll throw out a guess…. Aliens.
or… maybe a geo sat that just happened to flare at that time? I’m guessing it flared for shorter than 5 minutes, which gave it that funny shape.
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Could be a meteor moving straight towards you. So, no visible trail, just a bright spot that appears for a couple seconds and then fades.
Cheers,
Scott
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
a random splatter of hot/cold pixels maybe
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Sean Mc:
I’ll throw out a guess…. Aliens.
or… maybe a geo sat that just happened to flare at that time? I’m guessing it flared for shorter than 5 minutes, which gave it that funny shape. Hi Sean, I was thinking the same - it could be geo satellite, it's still weird to flash only once - but for me it's most plausible explanation at this moment |
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Scott Badger:
Could be a meteor moving straight towards you. So, no visible trail, just a bright spot that appears for a couple seconds and then fades.
Cheers,
Scott Hi Scott, Maybe. But that would be reeeeeally weird a? But it's one of the possibilities of course |
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
a random splatter of hot/cold pixels maybe Hi messierman, Maybe. But would be really weird to have so many temporary hot/cold pixels grouped together I think...
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Jure Menart:
Hi Scott,
Maybe. But that would be reeeeeally weird a? But it's one of the possibilities of course I've seen meteors in that way 3 or 4 times. The last time was just last week. I looked up and and saw what appeared to be a planet, but brighter than Venus, a little redder than Mars, and where there shouldn't be a planet (near Polaris). It didn't move and was visible for a few seconds then quickly faded away. Cheers, Scott
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
No idea but it looks square compared to your other stars
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
TiffsAndAstro:
No idea but it looks square compared to your other stars Yeah it indeed does interesting and puzzling  |
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Scott Badger:
I've seen meteors in that way 3 or 4 times. The last time was just last week. I looked up and and saw what appeared to be a planet, but brighter than Venus, a little redder than Mars, and where there shouldn't be a planet (near Polaris). It didn't move and was visible for a few seconds then quickly faded away.
Cheers,
Scott Hi Scott, Yeah it seems this is the most logical explanation. Funny though to have such a direct path Thanks for your comments!
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
For some reason, CMOS sensors are not as susceptible to cosmic rays as CCD sensors; however, it's still possible to catch one every once in a while. Depending on the angle of incidence a cosmic ray can produce all kinds of interesting patterns. I don't know exactly what this is but I wouldn't rule out the possibility that it's due to a high energy particle. I used to see stuff like this all the time with my 16803 based cameras.
John
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
I think John is on the right track with a cosmic ray, that was my first thought. Is the image you showed raw, or was it processed in any way? A cosmic ray would typically have sharp edges, but processing steps such as shifting or rotating the image in preparation for stacking can re-bin the pixels and smooth the edges.
A geosynchronous satellite would trail over time (of order 15 arcseconds per second), so the flare would have to be very short lived to produce a point source.
-Josh
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Aren’t geo sats supposed to be stationary?
cosmic ray sounds plausible too.
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
Josh Walawender:
I think John is on the right track with a cosmic ray, that was my first thought. Is the image you showed raw, or was it processed in any way? A cosmic ray would typically have sharp edges, but processing steps such as shifting or rotating the image in preparation for stacking can re-bin the pixels and smooth the edges.
A geosynchronous satellite would trail over time (of order 15 arcseconds per second), so the flare would have to be very short lived to produce a point source.
-Josh The images I showed aren't heavily processed - I stretched them and convert them to JPEG just for me easier to add pointing finger.
|
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
You cannot like this item. Reason: "ANONYMOUS".
You cannot remove your like from this item.
Editing a post is only allowed within 24 hours after creating it.
You cannot Like this post because the topic is closed.
Copy the URL below to share a direct link to this post.
This post cannot be edited using the classic forums editor.
To edit this post, please enable the "New forums experience" in your settings.
