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11
This is shocking!  It looks like anti-aircraft tracers!  :!

ditto - nasty Are we sure it's not a Tie fghter having a go at an xWing? Might be a cover story put out by Musk as part of the 'government conspiracy' or maybe its just a ploy by flat earthers to stop astronomers looking at the heavens and bleating on about round planets and stars being a the centre of solar systems. I think we should be told!

Meanwhile maybe some clever mathematician type bod can come up with a neural network algorithm thing like the new Star Remover tool to remove the trails. I suspect they will appear in every sub and several subs as they go round and round once they are spread out. I wonder how many will be sharing each final orbit?
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Astrophotography / Re: Cone and Christmas Tree Nebula NGC2644
« Last post by The Thing on Yesterday at 09:25:05 »
Hi Carole,

Isn't it about time you bought a chainsaw or moved?

BTW Can't see the picture.
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Astrophotography / Cone and Christmas Tree Nebula NGC2644
« Last post by Carole on Yesterday at 01:16:17 »
Also taken from Dave's back garden in Swanley Bortle 6 since I have a big tree in the way at Home in Bortle 8. I took Oiii and Sii but it did not add anything to the colour, so as I had already taken some RGB as well, "just in case" I processed HaRGB

Atik460EX & WOZS71 HEQ5
Ha 22 x 600
RGB 9 x 150secs binned each
Total imaging time 5 3/4 hours

Link to Astrobin for any-one who can't see it like Duncan, can you guys let me know if you can see it?

https://www.astrobin.com/full/wh19p2/E/

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Astrophotography / M42 Orion Nebula
« Last post by Carole on Jan 22, 2020, 23:45:29 »
I haven't imaged this target for many years, mainly due to it only being up during the winter and me being at my LP home, but also because next door's tree has grown somewhat and in recent years completely obscures Orion for 3 hours per night, so I get one hour before it disappears and maybe 2 hours after it emerges. 

I was moaning about this to Dave, one of the non members who goes to Cairds (of the use a tin of Baked Beans as a counter-weight fame).  So Dave suggested I went to his house in Swanley where he gets a clear run at Orion, and where his skies are Bortle 6, rather than my Bortle 8.   

So that's what I did over this last long weekend.  I went Friday and managed to image 4 nights on the trot, though there were some cloudy patches here and there.  I came home during the day time, to eat and get things done at home as well as walk the dog and keep Adrian company, especially as Monday was his Birthday.

I used my Hutech Idas LPS P2 LP filter (that Roberto recommended) in place of the Luminance filter.
I could not find the on-line tutorial I used to use for compositing the long and short images, so ended up doing selective layering and stretching in several iterations, in each of the filters which was very tedious.  I have since contacted the author Jerry Lodriguss who has pointed me to it's new location, so at least i have it for the future. 

Hutech Idas LP filter as Luminance 11 x 600
Ha 7nm 11 x 600
RGB 24 x 150secs binned x 2
All with individual shorter subs for the core
Total imaging time 6 hours

Atik460EX
WOZS71
HEQ5

Link to Astrobin for those who can't see the image:
https://www.astrobin.com/full/6bo454/D/

15
This is shocking!  It looks like anti-aircraft tracers!  :!
16
Announcements, Meetings, Events / Re: Tea Rota this Wednesday (22nd Jan 2020)
« Last post by Roy on Jan 22, 2020, 14:22:43 »
Thank you for letting us know Noel. We will sort it.

Cheers, Sue.
17
Alerts! Questions? Discussions... / Re: Starlink satellites on a murky night
« Last post by MarkS on Jan 21, 2020, 23:23:11 »
Here's the video:  https://drive.google.com/open?id=1uq3WlcLf7zalrUSirxJRGyMw9qLRfsh8

Tuesday 21-Jan-2020 starting at around 17:29 GMT and finishing 11 minutes later.
Nikon 35mm lens on Nikon Z6 at ISO 800 F/5.6
135 exposures of 5sec each, pushed 2.5 stops in processing.

A train of 40 Starlink satellites passed across the sky during this time.  Visually I observed a line of 15 satellites in the sky simultaneously.  At magnitude 3.0 they were pretty bright.

For best quality, download the video file and play it locally on your device.

Mark
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Alerts! Questions? Discussions... / Re: Starlink satellites on a murky night
« Last post by MarkS on Jan 21, 2020, 11:29:38 »
Depending on cloud cover, tonight provides another good opportunity to see them.  The spacing between them has increased but from 17:30 to 18:30 sixty Starlink satellites will pass over.  The first 40 satellites come in a 10 minute period but they might be difficult to see against the dusk sky.

Details here:
https://www.heavens-above.com/AllPassesFromLaunch.aspx?lat=51.4934&lng=0.0098&loc=Greenwich&alt=0&tz=GMT

The early ones will come up close to Venus but this will increase to approx. 20 degrees left of Venus.

They pass over for a second time from 19:00 onwards but they will be lower in the sky and dimmer.

Mark
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Alerts! Questions? Discussions... / Re: Starlink satellites on a murky night
« Last post by Carole on Jan 20, 2020, 09:15:52 »
Great to hear you are improved enough to start getting back into the "saddle".

It makes grim prospects.  I have been in a conversation on Astrobin about it, and we have all signed the petition I attached on another thread.  During which time I did some internet searching and found an E mail address for ESO who had got involved (European Southern Observatory), it was the Communications Officer, so I E mailed him telling him about all the 1000s of amateur astronomers and imagers who will be affected, not to mention the retailers, manufacturers and astro holiday places like Ollys and Astrofarm etc who might lose business if people gave up astronomy because of it. 

Upshot was he skyped me and we had a face to face conversation about it.

He says the professional astronomers have been in communication with Space Ex who are experimenting with a non-reflective coating on one of the satelittes, but are worried about it causing over heating. 

He suggested we got all the retailers involved since he felt loss of business would be a bigger influence than loss of hobby, and so I am starting to contact the same, but it would be good if others could help.
So far only managed to contact Deep Sky West who have yet to reply, and since then I have been back and forth to Swanley (Dave who comes to Cairds) for a mini astro weekend where he has Bortle 6 skies and no tree in the way of Orion.  Am on my 4th and last day there tonight.

Any further ideas Mark and any-one else.  I can see imaging and Astronomy being a no-go in a few years time unless software can deal with all the satelitte trails. 

Carole



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Alerts! Questions? Discussions... / Starlink satellites on a murky night
« Last post by MarkS on Jan 19, 2020, 19:43:24 »
I decided to do some imaging tonight (my hand has recovered sufficiently from the operation) but the sky quality was pretty bad - very murky with an SQM reading of 20.6 - so I would describe this as a practice run.

Walking out to the obsy at 18:20 I noticed a train of bright objects moving through the sky - 10 of them in all.  I checked on Heavens Above and sure enough it was Starlink - launch 3.  Apparently there should have been lots more but I just caught the final 10.

Here are the details from Heavens Above (location Greenwich):
https://www.heavens-above.com/AllPassesFromLaunch.aspx?lat=51.4934&lng=0.0098&loc=Greenwich&alt=0&tz=GMT

The sequence I saw ended with Starlink AN and they were all 10-15secs apart. Plenty more opportunities in the early evening over the coming days.  Well worth checking out because visually they actually look quite spectacular and it gives us an unfortunate and terrible preview into the future.

Mark
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