Archive for the ‘CometWatch’ Category

Comet Watch April 2018 with Special Guest Michelle Thaller Ph.D

Sunday, April 8th, 2018

Welcome to the April episode of Comet Watch featuring special guest, Michelle Thaller Ph.D  . My thanks, as always to my co-host Neil Norman!   Mary McIntyre is unwell and will be joining us again next month.

BAA Comet Section Visual Observations Page

Comet Lexell was discovered by Charles Mesier on June 14th,1770.
At this one and only apparition, it passed by Earth on its way to a August 14th perihelion, at a distance of 0.015 AU’s or 1,400,000 miles.
The comet was a member of the Jupiter family comets and originally had a perihelion distance of beyond 2 AU’s, but a close Jupiter approach by the comet in 1767 lead to its perihelion distance being radically changed . Comet Lexell holds the distinctions of being the first known JFC and also first NEO.
The comet again approached close to Jupiter in 1779 and the perihelion distance was increased greatly to some 3.3 AU’s.
The comet is today considered lost, but many still speculate that the comet was eventually expelled from the Solar System by Jupiter.
The debate continues………..

D/1770 L1 (Lexell)  http://cometography.com/pcomets/1770l1.html

Finding long lost Lexell’s comet: the fate of the first discovered near-earth object   https://arxiv.org/pdf/1802.08904.pdf

Evolution of orbit of Lexell’s Comet   https://vimeo.com/58118316

The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is an event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, at a time corresponding to the Neohadean and Eoarchean eras on Earth.

Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets  https://www.nature.com/articles/nature03676

http://www.pbs.org/wgbh/nova/blogs/secretlife/space-science/michelle-thaller/

Spacewatch  https://spacewatch.lpl.arizona.edu/

Asteroid Day   https://asteroidday.org/

Neoshield     http://www.neoshield.eu/

NEOShield Official Youtube channel   https://www.youtube.com/channel/UCbWym2jfxVXn9hEd7sUqrfA

Northolt Branch Observatories

BAA Comet Section page 

BAA YouTube Channel

The Astronomer

The Astronomer  Youtube Channel

The German Comet Group

Seiichi Yoshida’s page

Liga Iberoamericana de Astronomia

Comet chasing

The Sky Live (Comets) 

Minor Planets Center (IAU)

Comet Watch: March 2018 – with Special Guest Bob King

Thursday, March 8th, 2018

Welcome to the March episode of Comet Watch, featuring special guest, Bob King.  Our thanks, as always to co-hosts Mary McIntyre and Neil Norman!

Bob’s  Blog is at  http://astrobob.areavoices.com

Bob also writes a weekly blog for Sky & Telescope called “Explore the Night.” His Books are “Night Sky with the Naked Eye” http://amzn.to/2FaOLSI and “Wonders of the Night You Must See Before you Die” http://amzn.to/2oPKJ7t

http://cometography.com/pcomets/017p.html

Brian Marsden  http://www.skyandtelescope.com/astronomy-news/brian-g-marsden-1937-2010/

“IF IT MOVES OR EXPLODES, MARSDEN WANTS TO KNOW ABOUT IT”

(more…)

Cometwatch 2018/01/28 with Wendy Clark

Monday, January 29th, 2018

A Great Start to 2018 with  our first guest of the year Wendy Clark, My Thanks as always to my co-hosts  Mary McIntyre and Neil Norman and to the Northolt crew for the entertainment as we recorded!

Astro Farm France

Minor Planets Center (IAU)

BAA Comet Section page 

BAA Comet Section Visual Observations Page

BAA YouTube Channel

The Astronomer

The Astronomer  Youtube Channel

The German Comet Group

Seiichi Yoshida’s page

Liga Iberoamericana de Astronomia

Comet chasing

The Sky Live (Comets) 

CometWatch 2017/10/18 with Special Guests Rich Kowalski, Jim Scotti and Rik Hill

Thursday, October 19th, 2017

This month, Nick Evetts and Mary McIntyre cover the latest discoveries, what is visible in the night sky, and part 2 with our guests, Jim Scotti of Spacewatch and Rich Kowalski and Rik Hill from the Catalina Sky Survey!

https://spacewatch.lpl.arizona.edu/

https://catalina.lpl.arizona.edu/

https://www.lpl.arizona.edu/

http://www.lpl.arizona.edu/~rhill/

https://www.hq.nasa.gov/alsj/jimscotti.html

BAA Comet Section page 

BAA Comet Section Visual Observations Page

BAA YouTube Channel

Project Alcock

The Astronomer

The Astronomer  Youtube Channel

The German Comet Group

Seiichi Yoshida’s page

Liga Iberoamericana de Astronomia

Comet chasing

International Comet Quarterly

Cometbase

Comet Watch 2017/09/27 With Special Guest Christina Feliciano

Friday, September 29th, 2017

This Month Nick Evetts, Mary  McIntyre and Neil Norman talk about the  latest discoveries and current Comets and Welcome our Guest  Christina Feliciano.

 

BAA Comet Section page 

BAA Comet Section Visual Observations Page

BAA YouTube Channel

Project Alcock

The Astronomer

The Astronomer  Youtube Channel

The German Comet Group

Seiichi Yoshida’s page

Liga Iberoamericana de Astronomia

Comet chasing

International Comet Quarterly

Cometbase

Comet Watch 2017/08/12 With Guest Richard Pearson FRAS

Saturday, August 19th, 2017

This Month Nick Evetts and Neil Norman talk about the discoveries and current Comets and Welcome our Guest Richard Pearson FRAS,

Mary  McIntyre  is at Solar Sphere  and will be back next month!

Yearbook of Astronomy 2017

http://rpspace59.blogspot.com/2017/06/information-for-astro-photographers.html

 

BAA Comet Section page 

BAA Comet Section Visual Observations Page

BAA YouTube Channel

Project Alcock

The Astronomer

The Astronomer  Youtube Channel

The German Comet Group

Seiichi Yoshida’s page

Liga Iberoamericana de Astronomia

Comet chasing

International Comet Quarterly

Cometbase