Search found 712 matches

by RMSteele
Tue Dec 15, 2020 9:56 am
Forum: Gallery
Topic: Old Mars from 2016
Replies: 5
Views: 312

Re: Old Mars from 2016

Interesting image! It’s similar to the view, resolution-wise that l have had in my 90mm refractor this opposition. Thanks for posting this. Bob
by RMSteele
Mon Dec 14, 2020 11:26 pm
Forum: Observing
Topic: Geminids 2020
Replies: 21
Views: 576

Re: Geminids 2020

2020 Dec 14, 2255 to 2310 UT. One geminid seen, mag 0.0, red, near zenith, travelling se to nw. Bob
by RMSteele
Mon Dec 14, 2020 11:10 am
Forum: Observing
Topic: Geminids 2020
Replies: 21
Views: 576

Re: Geminids 2020

New Farnley, south-west Leeds, 2020 Dec 13, 2334 to 2352 UT, looking east and south, 3 Geminids seen: one south mag 0.0, one ssw mag minus 1.0, one east through Cancer maybe (hard to position because no naked eye stars in the area due to artificial light) minus 5, white fireball, one second ending i...
by RMSteele
Sun Dec 13, 2020 9:36 pm
Forum: Observing
Topic: Betelgeuse fades again
Replies: 14
Views: 786

Re: Betelgeuse fades again

Hello, interestingly there is quite some uncertainty about our old friend's distance, size and luminosity these days: however, the variability is something we can all see with the naked eye. I made a more reliable estimate this evening at 2120 UT. Compared with Pollux, which was at the same altitude...
by RMSteele
Sun Dec 13, 2020 5:48 pm
Forum: Observing
Topic: Betelgeuse fades again
Replies: 14
Views: 786

Re: Betelgeuse fades again

Hello, my estimate for Betelgeuse at 00.30 UT on 13 Dec 2020 is Procyon minus 1 or 2 steps: an odd impression of it being somewhere between the two. I know that’s a daft statement but with Procyon at mag 0.34 I would put Alpha Ori at 0.5. Other, better estimates would be welcome!
Regards, Bob
by RMSteele
Wed Dec 09, 2020 9:54 am
Forum: Astrophysics
Topic: Book Review:Hirshfeld's "Astronomy Activity and Laboratory Manual"
Replies: 2
Views: 218

Re: Book Review:Hirshfeld's "Astronomy Activity and Laboratory Manual"

Michael, this author also wrote an interesting book on the history of astronomy in the search for stellar distances: it’s called “Parallax”. I enjoyed it. Bob
by RMSteele
Wed Dec 09, 2020 9:47 am
Forum: Observing
Topic: Mars in a Small Telescope
Replies: 8
Views: 287

Re: Mars in a Small Telescope

Michael, hello to you. Keep getting the views of Mars before it gets too far away. I look forward to seeing more sketches - I wonder what you could show us through that 10 inch, if you can get it out of the garage. I wish I had interesting stuff like that in my garage: just an old motorcycle, old to...
by RMSteele
Sun Nov 29, 2020 12:33 pm
Forum: Gallery
Topic: Mars - 28 November 2020
Replies: 3
Views: 435

Re: Mars - 28 November 2020

Hello Brian, A good view of what I call "the hand of Mars" this opposition - the Mare Erythraeum region and its "fingers". It still looks a little dusty. I observed "the thumb" of Solis Lacus on 22/11 and it was hazy and hard to pick out the details from the little dust...
by RMSteele
Thu Nov 26, 2020 5:09 pm
Forum: General chat
Topic: Strange Times
Replies: 8
Views: 625

Re: Strange Times

Brian, how quaint! :lol:
by RMSteele
Thu Nov 26, 2020 11:42 am
Forum: Gallery
Topic: Sunspots
Replies: 0
Views: 954

Sunspots

Taken by Lesley Steele on Apple Ipad. Projected image from 90mm refractor stopped down to 60mm at F15, 1120 UT, New Farnley Leeds, seeing good, transparency fair.
by RMSteele
Wed Nov 25, 2020 5:47 pm
Forum: Observing
Topic: The Wilson effect
Replies: 1
Views: 183

Re: The Wilson effect

Quick sketch from an image thrown onto a white screen in my projection box. The image scale is 20cm to to the full projected disc. Wilson Effect just discernible on the limbward spot. Bob
by RMSteele
Tue Nov 24, 2020 8:23 pm
Forum: Gallery
Topic: Another "Sunspot" - 19th November
Replies: 8
Views: 402

Re: Another "Sunspot" - 19th November

No luck with the Sun here Mike, although yesterday I did get a close-up with the 90 mm. The large spot on the limb was showing the Wilson Effect and I managed to sketch it at 1330 UT. Did you see it today? Bob
by RMSteele
Tue Nov 24, 2020 5:04 pm
Forum: Observing
Topic: Martian dust storm gathering
Replies: 5
Views: 271

Re: Martian dust storm gathering

Brian, I happened to be observing the region on the 21st but did not realise there was a dust storm going on. Now I know why I found the details so hard to pick out and why M Sirenum looked so fuzzy. Coincidentally Chris Nuttall was observing at York just 40 mins before and recorded the same scene. ...
by RMSteele
Tue Nov 24, 2020 1:06 pm
Forum: Gallery
Topic: Mars Opposition in a 90mm Refractor
Replies: 4
Views: 370

Re: Mars Opposition in a 90mm Refractor

Brian, Jeff, Brian, Thank you for your comments. I constructed it by drawing grid 50mm tall and divided into 12 vertical sections 10mm wide, with a central “equator” line - the same scale as the eyepiece sketches where, for example the width of the Syrtis Major at the centre of the sketch done on 27...
by RMSteele
Mon Nov 23, 2020 11:17 am
Forum: Gallery
Topic: Mars Opposition in a 90mm Refractor
Replies: 4
Views: 370

Mars Opposition in a 90mm Refractor

Hello, I did a strip sketch of Mars last night in a spare hour or so while the wife was watching "Strictly" on the telly. I used only my own sketches from 27 September to 21 November 2020, so it doesn't pretend to be an accurate chart. I simply constructed it as an extended drawing from my...