Search found 505 matches

by Mogget
Mon Sep 06, 2021 5:29 pm
Forum: General chat
Topic: Observing comets
Replies: 7
Views: 394

Re: Observing comets

I had a copy of the 1986 edition of that catalogue a long time ago. I am currently using Halley - Electronic Ephemeris of Comets (Yuri Bondarenko) to study the long term orbital evolution of numbered short period comets.
by Mogget
Mon Sep 06, 2021 10:37 am
Forum: Classifieds
Topic: WANTED - Cometography Volume 3 and 4
Replies: 0
Views: 593

WANTED - Cometography Volume 3 and 4

Does anyone have copies of Volumes 3 and 4 of Gary Kronk's Cometography that they would be willing to sell? I have revived my study of the historical evolution of short period comet orbits (with a much more accurate orbit integrator), and these two volumes would be invaluable for my research. I alre...
by Mogget
Mon Nov 20, 2017 1:23 pm
Forum: General chat
Topic: SPA News Reports
Replies: 2
Views: 2080

Re: SPA News Reports

Thanks, Brian.
by Mogget
Sat Nov 18, 2017 9:11 am
Forum: General chat
Topic: SPA News Reports
Replies: 2
Views: 2080

SPA News Reports

I have just changed my email address, but I would like to continue getting the SPA news reports. Do I need to do anything here, or will they be automatically sent to my new email address?
by Mogget
Wed Aug 31, 2016 3:20 pm
Forum: General chat
Topic: Peter Grego
Replies: 13
Views: 4616

Re: Peter Grego

I remember when he asked me to write an article for Popular Astronomy (on satellite observing) many years ago, and that was followed by a handful of book reviews. Very sad news :cry:
by Mogget
Thu Jun 23, 2016 7:50 am
Forum: Space exploration
Topic: Fast micro-probes to alpha Centauri ?
Replies: 7
Views: 3728

Re: Fast micro-probes to alpha Centauri ?

Seriously though, why at this point in time does Stephen Hawking regard interstellar travel as an urgent matter? Surely, along with other prominent people in the scientific community, he should be urging an end to the fouling of the nest. The first priority is to treat our planet with respect. Mayb...
by Mogget
Tue May 10, 2016 10:21 am
Forum: Observing
Topic: Mercury in Transit
Replies: 13
Views: 3911

Re: Mercury in Transit

I managed to see the sunspot, but with no support for my 8x30 monocular, the image of the Sun was dancing around too much for me to see Mercury :(
by Mogget
Wed Apr 27, 2016 9:31 am
Forum: General chat
Topic: Mercury transit
Replies: 8
Views: 2726

Re: Mercury transit

Everything went well in the North-West for the Venus transit. A small refractor was used, capped with a BAADER solar filter.
I simply used a Solar Eclipse viewer (a decent CE certified one), and the "black dot" was very easy to see.
by Mogget
Tue Apr 26, 2016 8:47 am
Forum: General chat
Topic: Mercury transit
Replies: 8
Views: 2726

Re: Mercury transit

I have never seen Mercury, so this would be a good time to correct that. The transit of Venus on 2004 June 8 was easily observed from my home town of Ulverston.
by Mogget
Mon Feb 15, 2016 4:23 pm
Forum: General chat
Topic: Case made for 9th planet in Solar System say astronomers
Replies: 12
Views: 3548

Re: Case made for 9th planet in Solar System say astronomers

Did anyone see the Sky at Night episode "Planet 9 from Outer Space"? That was really interesting. I knew about the similarity between the alignment and inclination of the orbits of Sedna, 2012 VP113 etc, but I wasn't aware that the complex simulations also predicted another set of orbits i...
by Mogget
Mon Jan 25, 2016 12:32 pm
Forum: General chat
Topic: Case made for 9th planet in Solar System say astronomers
Replies: 12
Views: 3548

Re: Case made for 9th planet in Solar System say astronomers

It's quite interesting to note that current simulations seem to indicate that there was a fifth giant planet that was ejected from the Solar System (probably by Jupiter) soon after planetary formation. I had assumed that it was gravitationally kicked from the Sun's grasp completely, but that might n...
by Mogget
Thu Jan 21, 2016 11:42 am
Forum: General chat
Topic: Case made for 9th planet in Solar System say astronomers
Replies: 12
Views: 3548

Re: Case made for 9th planet in Solar System say astronomers

Very interesting news indeed. IMO, the discovery of a new major planet in the Solar System would be the astronomical find of the century!
by Mogget
Wed Sep 09, 2015 8:04 am
Forum: Astrophysics
Topic: Europa's orbit
Replies: 3
Views: 2703

Re: Europa's orbit

The density of Europa (3.01) is less than Earth's Moon (3.34). With respect to the four Galilean satellites, only Io (3.50) has a density greater than our Moon.
by Mogget
Tue May 05, 2015 1:19 pm
Forum: Computers and astronomy
Topic: Halley - Electronic Catalogue of Comets
Replies: 9
Views: 10633

Re: Halley - Electronic Catalogue of Comets

Does anyone know if Yuri is still actively developing Halley? I tried to contact him a month ago by sending a message on the Halley website, but I have not had a response. It has been three years since he updated the software....
by Mogget
Fri Mar 20, 2015 12:47 pm
Forum: Observing
Topic: Solar Eclipse Report
Replies: 1
Views: 1199

Re: Solar Eclipse Report

It was cloudy in Ulverston, but amazingly the cloud thinned several times at the exact location of the Sun and Moon! If I was a religious man, I would say that God was doing me a favour!! :) I first saw it at around 8:45 AM when the Moon had taken a small chunk out of the Sun. This was followed by 9...