Here’s a listing of the doubles i was expounding in my Talk last night.

They are in Orion.
All of these multiple star systems are within a minute of arc
in size. The tightest one, Zeta, is only 2.4 arc seconds, and will
test your telescope, but don’t dispair, it’s a triple star and you can
separate the larger separation easily.

In order of increasing difficulty,

(1) Mintaka, the western star in Orion’s belt (2.2, 6.3)
(2) Iota, the tip of the sword, (2.8, 6.9). Note the colours
(3) and in the same field of view, Struve 747 (4.8, 5.7)
(4) Theta 2, a wider grouping just east of the Trapezium
(5) 1/3 degree south of Betelgeuse, is Struve 817. Evenly matched, 8.2 and 8.3. Can you discern which is the brighter one?

Now reach for the telescope…
(3) Lambda, Orion’s Head (3.6, 5.5)

(2) Rigel, the western foot (or is it a knee?) (0.1, 6.8, 1/600 of a degree)

(8) Theta 1, the ‘Trapezium’ in the heart of the Orion Nebula – do you agree it’s the finest looking multiple star system in the sky?

(9) Sigma, near the eastern star of Orion’s Belt… it’s one of the brightest and most massive double star in the sky.
Those stars are more than 30 thousand times brighter than the sun, each) (4.0, 7.5, 6.5) The close pair is 12 arcseconds.

(10) Zeta Orionis, the eastern star in Orion’s Belt. It’s a triple (1.9, 4.0, 9.9) (The close pair is 2.4 arcseconds apart)

9 of these are on the “Astronomical Leage’s” top 100 Double Stars.

If you observe them, do a little sketch. If you get these, and the other 90, there’s an award for you!

Clear Skies!

Steve

This is the December 21, 2010 Lunar Eclipse; approximately 3:25 AM, from my condo complex parking lot.

Tamron 300mm f/2.8 lens; Canon Digital Rebel 300D; 0.5 secs at ISO 400.

— Bob Christmas

Lunar Eclipse Dec. 21, 2010 by Bob Christmas

Watched the Eclipse from 2:25 to 2:50 this morning. At 2:37 I was looking through my binos and a brilliant meteor passed directly in front of the moon. It was startling as the contrast of the white flash against the orange background made me blink. We had partially clear skies in brantford and the seeing at times was very good. Easily saw the 3 globs in Auriga. M35 in Gemini and the moon just fit into the same field of view in my binos. Hope any who stayed up had clear skies! By the way, the time on the site is off by one hour so it looks like I posted this before it actually happened.
Follow up: It turns out that there was a meteor shower scheduled for last night; the Ursids. I guess I just got lucky being in the right place at the right time!

Don’t forget…

It’s the first time we have had a Lunar Eclipse on the Winter Solstice
since the invention of the telescope.

It’s very late Monday night, (Tuesday Morning) and you can see it from anywhere.

Canis Major won’t be in the early evening sky for a month or two,
but here’s a chance to brush up on connecting the dots.

I am including 2 renderings of Canis Major here…
Pick one and see if you can do better than a 5 stick figure in my star atlas.

Steve

Canis Major to Magnitude 6.0, designed for printing, then drawing the lines to make it look like something.

This one has a few less stars. I still see a poodle when i look at it.Best to right click, save the image, then print it.

Kevin sets up to help at the Scope Clinic

Last night’s Scope Clinic was very well attended by club members eager to answer questions and offer recommendations to the public and other members about selecting astronomical equipment.

Steve Germann demonstrated telescope anatomy by assembling a Galileoscope in front of a crowd of interested spectators. The assembled telescope was tested and everyone had a chance to look through it before it was raffled off.

Steve assembles a Galileoscope before an enthralled crowd.

Due to the club’s efforts, I’m sure Santa will be delivering fewer “trash” scopes this Christmas!

This is from Mike Jefferson:

LOFAR II is up and running – taking solar data and transmitting to Stanford again after a 2-month hiatus for overhaul. It has a new data-slave running on Wndows XP. It logged and transmitted 3.5 hr.s of data on November 19 and should have 24 hr.s of accumulation for November 20. My thanks to Chris Kubiak for all of the programming and configuring he did for this project!

-Mike J.

Two of the most prominent astronomers of the 20th century passed away this week.

Alan Sandage was a cosmologist and assistant to Edwin Hubble. Hubble (after whom the Hubble Space Telescope is named) discoved that the universe is expanding. Sandage, an American, worked under him as a grad student and carried on his work after Hubble’s death in 1953. He went on to provide what was at the time the best, and oldest, estimates of the age of the universe. He also studied star and galaxy formation, discovered jets in M82 and created the first 3 dimensional model of the structure of the nearby galaxies.

And just yesterday Brian Marsden passed away. Marsden, originally from England but residing in the United States, ran the Minor Planet Center at Harvard for many years. An expert on asteroids and comets, his was the final word regarding the discovery of new solar system bodies. He also was director of the Central Bureau for Astronomical Telegrams for 30 years, where all initial reports of new astronomical discoveries were sent. First word of a new supernova, or comet often came from Marsden.

Learning about what’s out there is often enhanced by learning about how thngs are discovered and the stories of thier discoverers. Now would be a great time to read up on the work that these two great astonomers did.

There’s a supernova recently discovered, and brightening.

It’s near UGC 5189A and it’s better than 12th magnitude.

Here’s a link to the page detailing other recent supernovae,

http://www.rochesterastronomy.com/supernova.html

and here’s a photo of it

This is the best place to put some of the links and information i mentioned.

First of all, the name of the mystery comet…

C/2010 V1 (Ikeya-Murakami)

and some photos of it, courtesy of Paul Mortfield.

http://www.backyardastronomer.com/comets/2010V1_20101109-1a.jpg

http://www.backyardastronomer.com/comets/2010V1_20101109–FSQ_3a.jpg

and the link to Cartes Du Ciel

http://www.simtel.net/product.download.mirrors.php?id=59452

which will help you download a zip, which when unzipped, contains an exe which installs it all.

And finally, a series of star maps for Auriga.

This is for connect-the-dots. Kudos to anyone with a creative line drawing that uses most of the stars. You don’t have to make a shepherd, but if you draw something else, let us know why the drawing is as it is (your legend to go with the constellation)

From your browser, right-click on an image and choose ‘save picture as’. You should then be able to print it just by double-clicking it and selecting the print toolbar button in your preview program.

A star chart just showing stars in Auriga brighter than Magnitude 4.5

A chart shoing the stars of Auriga brighter than magnitude 5.0

A chart showing the stars of Auriga brighter than Magnitude 5.5

A chart showing the stars of Auriga brighter than Magnitude 6.0

A chart showing the stars of Auriga brighter than magnitude 6.5

The most detailed chart, shows the stars of Auriga brighter than magnitude 7.0