Search found 1269 matches

by rwilkinson
Thu Apr 18, 2019 12:49 pm
Forum: Astronomical events
Topic: BAA Star Count survey 2019
Replies: 2
Views: 522

Re: BAA Star Count survey 2019

The results are out: https://www.cpre.org.uk/media-centre/latest-news-releases/item/5102-help-us-enjoy-starry-night-says-cpre-as-cosmic-census-reveals-scale-light-pollution Well over half of all participants (57%) failed to see more than ten stars, meaning that they are severely impacted by light po...
by rwilkinson
Wed Apr 10, 2019 6:52 am
Forum: Club events
Topic: Dark Matter - at Bolton School
Replies: 1
Views: 108

Dark Matter - at Bolton School

This public lecture later this month should be of interest to our Members:
darkmatter.jpg
darkmatter.jpg (190.79 KiB) Viewed 108 times
by rwilkinson
Wed Apr 03, 2019 3:56 pm
Forum: Physics, Space Science and Theories
Topic: Historical impact events?
Replies: 0
Views: 118

Historical impact events?

Following Martin Lunn's talk last night, I found this Review Paper from 2007 which neatly summarises the ideas about "unreported" impact events in recorded history and the observations from tree-rings and ice-cores:
http://tsun.sscc.ru/hiwg/pabl/baillie_2007_jqs.pdf
by rwilkinson
Fri Mar 29, 2019 9:25 am
Forum: Astronomical events
Topic: Flaring up?
Replies: 0
Views: 144

Flaring up?

Last night, during the course of some tests with an 18mm lens, I captured a transient event near Cassiopeia : flare.jpg This occurred during a 30-sec exposure just before 9pm. I wondered if it was a meteor , but the trail looked too short and symmetrical for that. I made a "heat-map" of its intensit...
by rwilkinson
Sat Mar 09, 2019 8:28 pm
Forum: Physics, Space Science and Theories
Topic: Ultima Thule flyby - 1st January
Replies: 5
Views: 979

Re: Ultima Thule flyby - 1st January

The New Horizons team have just published a pair of stereoscopic high-resolution images as a 3D pair:
http://pluto.jhuapl.edu/News-Center/New ... e=20190307
I found that I got the best effect from the "cross-eyed" pair.
by rwilkinson
Fri Mar 08, 2019 12:13 pm
Forum: Astronomical events
Topic: Comet 46P/Wirtanen
Replies: 9
Views: 2273

Re: Comet 46P/Wirtanen

This comet has declined from 3rd down to 11th magnitude in the last couple of months, but it's high in the sky in Ursa Major at the moment, so I could easily detect it with my faithful old Mx716 camera. 46p_7mar.jpg I also had a look for 123P/West-Hartley , which I'd expected to be fainter (12th or ...
by rwilkinson
Thu Feb 28, 2019 4:25 pm
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 7
Views: 1138

Re: Comet 2018 Y1 (Iwamoto)

I got some more data last night, this time using one of my Sony cameras on the StarWave 80mm refractor:
composite.jpg
Comet Iwamoto on 27-Feb, with M36 & M38. 56x 120-sec with Sony NEX5R on 80ED at f/5
composite.jpg (185.51 KiB) Viewed 838 times
I could have done a better job of framing it, but I'm not used to this wide-field camera yet!
by rwilkinson
Thu Feb 28, 2019 8:02 am
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 7
Views: 1138

Re: Comet 2018 Y1 (Iwamoto)

rwilkinson wrote:
Wed Feb 27, 2019 4:48 pm
This gave a wide enough field of view to take in the three Open Clusters M36, M37 & M38 as well as the comet.
This is the full frame.
clusters.jpg
Comet Iwamoto and three Open Clusters. Sony NEX 5 with Pentax 135mm lens: 61x 170-sec at f/5.5.
clusters.jpg (209.78 KiB) Viewed 852 times
by rwilkinson
Wed Feb 27, 2019 4:48 pm
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 7
Views: 1138

Re: Comet 2018 Y1 (Iwamoto)

Last night I had two independent imaging systems running side-by-side in my garden. The first was my Sony NEX 5 camera fitted with a Pentax 135mm lens, running on my EQ tracking platform. This gave a wide enough field of view to take in the three Open Clusters M36, M37 & M38 as well as the comet. So...
by rwilkinson
Wed Feb 27, 2019 8:09 am
Forum: Equipment - Help
Topic: 2 star alignmemt trouble
Replies: 2
Views: 505

Re: 2 star alignmemt trouble

According to this thread on the CloudyNights forum you can ignore the message: https://www.cloudynights.com/topic/491688-synscan-firmware-336-question/?p=7352587 It sounds like it's something which may pop up when your latest alignment is done with a different method from the previous one. The messa...