bob-c

Lovely Geof.

A great image Dave.

Bob.

A great image Peter, have been imaging E3 also but nothing near as good as your image.👍

Bob.

A great image of E3 this.

Bob.

3 minutes ago, geoflewis said:

There is a strong body of opinion that high resolution planetary imaging isn't possible with a fast jetstream parked overhead. Whilst experience indicates that is a reasonable general rule, there have been several occasions when that has not been proved true. Take last night as an example......

My wife and I had been binge watching the David Tenent 4 part series "Inside Man" and were heading for bed around midnight, but as usual I popped my head outside first and to my surprise there was a clear sky. I checked a couple of weather sites, including the jetstream forecast and thought, NO, I'll be wasting my time, then thought again, well why not give it a go. FYI here are 2 jetstream forecast for midnight 14 October and 1am 15 October - different sites, but essentially the same with a fast jetstream parked over the UK.

So how did I capture this?

Ok, so maybe not fully hi res, but far better than I saw a few nights ago with the jetsream out of the way. I managed 5 x 6 min SERs over about 45 mins, the above image comprising best 6000 frames from 3 of the de-rotated and quality graded SERs, so 18000 frames in total.

After Jupiter, I thought I'd try Mars for the first time this year, however, by the time I got Mars on the sensor and defined capture settings in FireCapture, fog had rolled in so quickly that Mars was no longer visible naked eye, and the nearby waning moon had dimmed considerably, so I called it a wrap. It seems that if the jetstream doesn't always get you, then fog definitely will.

So back to imaging through a fast jetstream; it's something that I've discussed a few times with my mentor, Dave Tyler, who suggests that it's not just the jetstream, but whether it comprises a steady laminar flow, or there is turbulant mixing going on. My location in south Norfolk was right in the middle of the flow last night and I suspect that whilst the atmosphere was fast moving, it was doing so at a stable rate, not mixing as much as it might do at the edges of the stream. It's just a contention, but nevertheless, not for the first time I was able to image fairly successfully through the jetstream.

I'm interest to learn what others think about this.

 

Don't know much about the Jet stream Jeff, but it looks a fine image to me. 

Bob.

A very nice Mars 👍

Bob.

A great looking image.

Bob.

A nice image that.

Bob.

Very nice Neil 👍

Bob.

Very well done Lee. its on my to do list.

Bob.

Lovely image Peter.

Bob.

Not imaged for about a month (had a bit of a rest from it),  this is my first session and decided as the nights are very short here in Stoke-on-Trent ,to image some comet's and this is the best one out of the three i imaged.

First pic is 3x180s and second pic 17x180s. Imaged with my OOUK ODK12 and A A 294c ProTec Hypercam.

3 hours ago, Davey-T said:

Nice one Bob, haven't done much astro' this year but got a list of comets to have a go at now.

Dave

Cheers Dave for the comment, glad you are planning again, thought i hadn't seen much of you on here of late.

Bob.

3 hours ago, JeremyS said:

That is super Bob 👍🏻

Thank you Jeremy for your comment.👍

Bob.

Hi everyone, managed to do some imaging on Friday evening into the early hours of Saturday morning. This is a pic of comet K2 as it travels through Aquila..4x180s stack .

Telescope...OOUK ODK12 ..

Camera...A A 294c Protec Hypercam

Mount...Ioptron 120ec .

Bob.

A nice image of this event 👍

Bob.

3 hours ago, robin_astro said:

I love the blue colour, confirmed by the spectrum which is brighter at the blue end

Here is the raw  spectrum image. (Using an ALPY 600 spectrograph)

The deep absorption line marked is from singly ionised Silicon formed by nuclear fusion in the thermonuclear explosion of  the white dwarf (this is a type 1a). 

(The other lines in the background are from natural airglow and light pollution)

and here is the calibrated spectrum 

We can measure the velocity of the  material thrown out by the explosion by how far the absorption line has been blue shifted due to the doppler effect (~15000 km/s.) The silicon is actually from the partially "nuclear burned" material near the surface of the white dwarf. Heavier elements up to Iron are produced  by further fusion deeper within the explosion. It is near maximum at about mag 12.5 currently which, taking into account the distance to the galaxy makes it several billion time more luminous than the sun

Cheers

Robin

Thanks Robin for this information,  it is a bit above my old head though to take in but i am fascinated by all of it, thank you very much .

Bob.

Nice capture Bill. I imaged it also on the 24th. It must be a huge event.

Bob.

13 hours ago, markse68 said:

It looks like it must be really huge SN!

Yes Mark thanks for your comment, it must be one powerful event. The mind boggles at such a thing.

Bob.

Hi , thought i would have a try for the new (SN2022HRS) supernova that was discovered on the 16th of this month in NGC4647 in Virgo. It outshines the host galaxy easily. It consists of 10x600s stacked and processed in APP and Photoshop.

Equipment used, OOUK ODK12 ,  A A 294c ProTec Hypercam,  Ioptron 120ec mount. Zwo 290 mini guide cam.

Capture Software  APT.  and guided with Phd2.

Bob

Very nice Peter.

Bob

Very nice images Neil.

Bob.

Nice impressive images Pete.👍

Bob.

17 hours ago, Pete Presland said:

Caught all the activity there, very nicely captured.

Thank you very much Pete .

Bob

A lovely image well done.

Bob.