25 January 2023 at 1:48 pm #615325
Just a plug to observe this comet, as it is now very conveniently placed in the sky for those in the northern hemisphere. Changes night to night.
Attachments:26 January 2023 at 7:36 am #615337
It certainly is. I measured it at mag 5.6 this morning with lots of detail visible in images.26 January 2023 at 2:29 pm #615346
Sleeker ion tail when imaged last night. The comet’s hood lends it the appearance of a speeding bullet.
Attachments:27 January 2023 at 7:07 am #615365
Gideon van Buitenen has produced a really nice simulation of the comet’s appearance which you can find here:
It shows the PA of the ion tail swinging around very rapidly over the next few days.
27 January 2023 at 7:37 am #615367James LancashireParticipant
- This reply was modified 1 year, 1 month ago by Nick James.
Not much luck with clouds on the Kent coast but I can’t remember the last time when a *bright* comet was circumpolar (from UK). Must be unusual timing and orbital geometry. Hoping for a favourable break in weather over next few days before full moon!27 January 2023 at 9:32 am #615368Lars LindhardParticipant
I was lucky last night
Canon 77D with 250 mm . Exp. 10.sec. ISO 3200.
Attachments:28 January 2023 at 1:08 pm #615373Charles Graham TaylorParticipant
Used Slooh Canary 2 on the night of 27 Jan at 0052 to take this image. Subsequent processing with Affinity PLus.
This Comet is just visible in 10×50 binos here in eastern Scotland.
- This reply was modified 1 year, 1 month ago by Charles Graham Taylor.
Attachments:28 January 2023 at 10:43 pm #615377
Captured this eve (midpoint) 2023-01-28T19:12. Lovely ion tail.
Attachments:29 January 2023 at 10:30 pm #615392
Development of ion tail into at least three streamers.
MIDPOINT = ‘2023-01-29T20:59:22’ /UT of midpoint of exposure
Attachments:30 January 2023 at 12:05 am #615395
David. Yes the ion tail is very active again. Your images are excellent. Your fast RASA is ideal for this.30 January 2023 at 9:37 pm #615427Paul G. AbelParticipant
Finally had some clear skies tonight and I just made this observation. Using HR3082 as a comparison star, I estimate a Mv~ 5.5
Attachments:31 January 2023 at 8:33 pm #615459
You guys up in the frozen north have it lucky.
I find it very frustrating that Polaris is only 28 degrees above the horizon from here. Even worse, my fork mount won’t allow pointing at anything above a Declination of 75N or the camera hits the mount. Guess where C/2022 E3 is tonight …
With luck it will be far south enough to give me a chance in a few days but, of course, the moon will then be very near full.
Life, don’t talk to me about life.
P.S. now the ****ing filter wheel has just packed up and I must go back to the dome to see what needs to be kicked into submission. Almost always a Windoze/USB failure.31 January 2023 at 10:41 pm #615466
Paul – That is why I have never liked fork mounts although the price I pay is meridian flips. The comet was really nice tonight despite the bright moonlight. I get it to be 5th mag now. Here is a picture of my telescope effortlessly pointing near to the pole taken while it was taking the picture in the inset. I don’t get many chances to take a picture like this!
Attachments:31 January 2023 at 11:38 pm #615471
Yes, we win some and we lose some. I don’t actually lose very much useful sky as Dec +75 reaches a maximum altitude of 43 degrees and a minimum of 13 degrees from here and I don’t much like doing photometry below 30 degrees altitude unless it is really necessary. I have always really loathed meridian flips.
HL CMa was nice and high in the sky here (just to make you jealous 🙂 — there are advantages to having a low celestial pole — until cloud stopped play. 1 made it V=12.33 tonight.31 January 2023 at 11:42 pm #615472Denis BuczynskiParticipant
In my experience I would have fork mount any day over a GEM. The problem with cameras and ancillary equipment fouling the mount in the fork design is not a problem for Newtonian or Nasmyth designs or indeed prime focus SC’s like the Celestron RASA . Meridian flips in a GEM are amongst the most common irritations I have with my SC on a GEM. Image attached of my last large Newtonian, oh how I miss it!
Attachments:1 February 2023 at 5:25 pm #615487
The best compromise, IMAO, is a fork with long enough arms.
Now the disadvantage is that it needs to be much more robust to prevent flexure. I am fairly sure that my fork would be capable with longer arms and is would appear that yours would be too.
All this is way off topic for this place. Perhaps Webmaster could create a new topic in an appropriate place and more the postings there. Please? Pretty please?15 February 2023 at 7:36 pm #615750James LancashireParticipant
I’ve now had some clear evenings in the past fortnight. I suspect tonight’s is my final view from Ramsgate. Will forward observations to Nick James.
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