Beginning of a new Sun Cycle

Llew

Llew

cerca trova...
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My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
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Very good info there. Any member far enough North to grab a pic of a possible Northern Lights spectacular?
 
Llew

Llew

cerca trova...
Staff member
Joined
Jan 1, 2000
Messages
16,259
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4,217
Points
113
Age
82
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
The Satellite Flybys app mentioned there for the iPhone looks interesting. Think I'll check that one out.

_http://simpleflybys.com
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
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A little less analogue, and a lot more crap.
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UK
The heavens above site has it all on one page per object

For example

_http://www.heavens-above.com/PassSummary.asp?lat=50.867&lng=8.033&alt=0&loc=Siegen&TZ=CET&satid=25544
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
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My Satellite Setup
A little less analogue, and a lot more crap.
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UK
Llew said:
Very good info there. Any member far enough North to grab a pic of a possible Northern Lights spectacular?
Click to expand...

Simply stunning

_http://spaceweather.com/aurora/gallery_01feb10_page3.htm?PHPSESSID=amntfq8ae8mq9qa58du95el607

A couple of days to go with the current activity.
 
Huevos

Huevos

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Channel Hopper said:
A comet would have to hit the ground/ocean at a final diameter of some 2 kilometres. At the fastest speed and minimal angle (ie perpendicular to the surface/head on) the original diameter would have to be some 7 to 10 kilometres in diameter.

Very few comets have that sort of mass (the Oort belt has some rather large stuff sitting out there though), and even fewer are anywhere near the orbit of this planet.

It still has to be rather large before it hits the atmosphere, and the big ones are being watched.
Click to expand...

Big ones come unexpectedly too. For example Hale-Bopp was uncatalogued and came out of nowhere. It was 60 kilometres in diameter and even though it was one of the brightest for centuries it wasn't noticed until it was 7.2AU from the sun. That passed within the Earth's orbit, 0.9AU from the sun, somewhere between Earth and Venus and lead to a mass suicide.
 
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