Search found 1257 matches

by rwilkinson
Fri Feb 15, 2019 4:27 pm
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 3
Views: 176

Re: Comet 2018 Y1 (Iwamoto)

I had another go last night - this time using a telescope! I'd fitted a focal-reducer to my 80mm doublet to give it a wide enough field to keep the comet in view for a couple of hours. But the sky was really hazy and full of aircraft contrails, and with the bright moonlight too I could hardly make o...
by rwilkinson
Fri Feb 15, 2019 7:53 am
Forum: Astrophotography
Topic: Too Many Aeroplanes
Replies: 1
Views: 252

Re: Too Many Aeroplanes

It's not just the navigation lights - last night there were loads of contrails painting stripes across the sky, and then taking ages to disperse. They looked quite eye-catching in the moonlight, but were bad news for those trying to detect faint objects beyond Earth's atmosphere. :( In particular, I...
by rwilkinson
Thu Feb 14, 2019 11:50 am
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 3
Views: 176

Re: Comet 2018 Y1 (Iwamoto)

It was quite hazy last night, and there was a bright Moon. I'd just been doing some tests with my equatorial wedge (which I showed at last week's workshop session) , when the sky cleared enough for me to make out Regulus and the "sickle of Leo ". I realised that this would be an opportunity to catch...
by rwilkinson
Sun Feb 10, 2019 7:13 pm
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 3
Views: 176

Re: Comet 2018 Y1 (Iwamoto)

I've just got a picture of the comet from Bathurst, New South Wales - where it's already tomorrow morning!
c2018y1_11feb.jpg
Comet Iwamoto on 11-Feb. 5x 60-sec with 11" RASA f/2.2
c2018y1_11feb.jpg (161.69 KiB) Viewed 143 times
It looks pretty spectacular through this instrument - let's hope for some clear nights here now...
by rwilkinson
Mon Feb 04, 2019 8:19 am
Forum: Member Observations - Blogging
Topic: Stars in Orion - Ross's Survey
Replies: 3
Views: 200

Re: Stars in Orion

I've just heard from our youngest member Matthew, who lives in a dark area of the Wye Valley. On Saturday night he was able to count 21 stars with his 13 year-old eyes :shock: I had another look on Saturday, and couldn't get more than nine from the middle of Bolton. But then I tried with my image-in...
by rwilkinson
Fri Feb 01, 2019 9:15 am
Forum: Astronomical events
Topic: Comet 2018 Y1 (Iwamoto)
Replies: 3
Views: 176

Comet 2018 Y1 (Iwamoto)

This one was discovered by a Japanese "amateur" (actually a retired professoinal astronomer) in December, and will be speeding across our sky this month. I've just got this picture from the OU's COAST facility on Tenerife: c2018y1_1feb.jpg It's moving so quickly at the moment that it's even trailing...
by rwilkinson
Tue Jan 29, 2019 2:08 pm
Forum: Member Observations - Blogging
Topic: Stars in Orion - Ross's Survey
Replies: 3
Views: 200

Re: Stars in Orion

After I'd been outside for a while on Sunday night I went down to the bottom of the garden and found a spot screened from all the local streetlamps. There I spent a few minutes staring up at Orion , which was then high in the South (this was around 9:30pm) and I was surprised to get up to nine stars...
by rwilkinson
Sun Jan 27, 2019 10:10 pm
Forum: Astronomical events
Topic: BAA Star Count survey 2019
Replies: 1
Views: 186

Re: BAA Star Count survey 2019

Just count the number of stars you can see within the rectangle of Orion and report back.
I had a practice tonight and got nine (plus one meteor!)
by rwilkinson
Thu Jan 24, 2019 9:51 am
Forum: Physics, Space Science and Theories
Topic: The Sun
Replies: 1
Views: 157

Re: The Sun

It's by analysing sunlight using a spectrograph . Splitting the light into a continuous spectrum, we can see lots of dark lines, each of which is due to absobtion by particular elements or molecules. These can be identified by comparing with the spectra of known substances in the lab. It's interesti...
by rwilkinson
Tue Jan 22, 2019 9:19 pm
Forum: Astronomical events
Topic: BAA Star Count survey 2019
Replies: 1
Views: 186

BAA Star Count survey 2019

As I explained at this evening's meeting, the BAA and CPRE are conducting a survey early next month: https://britastro.org/starcount2019 https://www.cpre.org.uk/what-we-do/countryside/dark-skies/star-count-2019 Just count the number of stars you can see within the rectangle of Orion and report back....