Search found 1314 matches

by rwilkinson
Sun Jan 19, 2020 9:49 am
Forum: Astronomical events
Topic: Comet 2017 T2 (PanSTARRS)
Replies: 4
Views: 794

Re: Comet 2017 T2 (PanSTARRS)

I caught the comet again from my garden last night.
It's a bit brighter than it was in November, but the tail is not as prominent:
c2017t2_18jan.jpg
Comet 2017 T2 on 18-Jan. 83x 60-sec with Mx716 on C8 at f.3.5
c2017t2_18jan.jpg (81.35 KiB) Viewed 14 times
by rwilkinson
Sat Jan 18, 2020 8:20 am
Forum: Physics, Space Science and Theories
Topic: Starlink's "string of pearls"
Replies: 4
Views: 404

Re: Starlink's "string of pearls"

There should be some opportunities to see these satellites over the coming week. Tonight they will be passing over Spain and France a few minutes before 6pm: 2020-01-18 STARLINK Train.jpg so they will appear low in the South from here: 2020-01-18 view.png They will be much higher in the sky later in...
by rwilkinson
Mon Jan 13, 2020 2:42 pm
Forum: Astronomical events
Topic: Comet 2017 T2 (PanSTARRS)
Replies: 4
Views: 794

Re: Comet 2017 T2 (PanSTARRS)

Towards the end of this month the comet will pass close to the famous Double Cluster.
This is its position on 27th January:
c2017t2_double.png
Cartes du Ciel chart showing the comet's position on 27-Jan
c2017t2_double.png (103.76 KiB) Viewed 84 times
Sadly the comet is only around 9th magnitude, so it will be difficult to spot even in binoculars; but it should present a good imaging opportunity.
by rwilkinson
Mon Jan 13, 2020 2:07 pm
Forum: Absolute Beginners
Topic: Beginners' Guide from The Sky At Night
Replies: 0
Views: 34

Beginners' Guide from The Sky At Night

Last night's episode provided a concise half-hour introduction to visual astronomy for beginners: https://www.bbc.co.uk/iplayer/episode/m000db8r/the-sky-at-night-a-beginners-guide I noted that all their young star-gazers had been kitted out with identical night-vision red-LED head-torches, just like...
by rwilkinson
Sun Jan 12, 2020 2:41 pm
Forum: Physics, Space Science and Theories
Topic: Starlink's "string of pearls"
Replies: 4
Views: 404

Re: Starlink's "string of pearls"

An observer in Fort Worth (Texas) has posted a video of "the train" of new Starlink satellites on the day of their launch:
https://youtu.be/FBbzAFXoloQ
It really does look like an airborne train-load of carriages on this clip!
by rwilkinson
Thu Jan 09, 2020 4:28 pm
Forum: Physics, Space Science and Theories
Topic: Starlink's "string of pearls"
Replies: 4
Views: 404

Re: Starlink's "string of pearls"

Some discussion of the potential impacts of these mega-constellations of satellites on astronomical research:
https://www.bbc.co.uk/news/science-environment-51049746
by rwilkinson
Tue Jan 07, 2020 8:17 am
Forum: Physics, Space Science and Theories
Topic: Starlink's "string of pearls"
Replies: 4
Views: 404

Re: Starlink's "string of pearls"

Their latest batch of sixty satellites (" Starlink 2 ") was launched overnight: https://www.rocketlaunch.live/launch/starlink-3 The Satflare website has predictions of their positions, which will be updated once their orbits are measured: https://www.satflare.com/track.asp?q=StarLinkLaunch&sck=1#TOP...
by rwilkinson
Sat Dec 28, 2019 8:47 am
Forum: Astronomical events
Topic: Comet 2017 T2 (PanSTARRS)
Replies: 4
Views: 794

Re: Comet 2017 T2 (PanSTARRS)

This comet isn't brightening much at the moment: it's still around magnitude 10. Hence the revised prediction is that it will peak at just 8th magnitude in May. The Open University 's team have recently fixed a scheduling problem with their robotic COAST facility, so last night I was able to catch t...
by rwilkinson
Fri Dec 27, 2019 1:07 pm
Forum: Physics, Space Science and Theories
Topic: Starlink's "string of pearls"
Replies: 4
Views: 404

Starlink's "string of pearls"

As we enter the New Year, prepare for more interference from bright satellite trails: https://www.bbc.co.uk/news/science-environment-50870117 Shortly after their previous launch in November Cheryl spotted a "train" of lights in the pre-dawn sky one morning, but at the time we weren't sure what they ...
by rwilkinson
Sun Dec 01, 2019 2:08 pm
Forum: Astronomical events
Topic: Comet 2017 T2 (PanSTARRS)
Replies: 4
Views: 794

Re: Comet 2017 T2 (PanSTARRS)

The following night I tried it with a colour imaging system: a Sony mirrorless camera on the back of my 80mm refractor.
This is more convenient as it all runs off a battery - I don't need a laptop nor a mains cable.
c2017t2_30nov.jpg
C/2017 T2 on 30-Nov. 71x 85-sec with Sony NEX5R on StarWave 80ED at f/4.8
c2017t2_30nov.jpg (170.92 KiB) Viewed 785 times