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September 11, 2010, 07:07:34 AM

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Topic: Eclipsing binary, 12 June 2010 (+ an asteroid)  (Read 99 times)

Rob_K
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« on: June 12, 2010, 10:26:48 PM »

Beautiful skies tonight and checked my usual recurrent nova targets without a result, as usual.

But in blinking the field later, I noticed a star that is normally bright (checked right back to March) was quite dim.  Found the star in Starry Night (it said it wasn't variable, which turned out to be true) and I put the co-ords into AAVSO's Variable Star Plotter and told it to mark all variables in the field.  It came up as WX SGR.

Googled that, and found that WX SGR is an eclipsing binary (mag 9.6-11.3).  Presumably it is eclipsing now.  Here's an animation:



Couldn't find any obs in AAVSO's database, so sent an alert just in case anyone was interested.  Can't imagine that the period wouldn't be very well known - probably just that Algol and mates are much sexier!

In the wider field, also found Ceres (as always! ) plus asteroid 15 Eunomia, quite bright at mag 9.3 and another one that took a bit of hunting down (and gave the old heart a flutter - nova!! Rolling Eyes Sad )



It was below frame on 2 June.
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Rob - Bright, Victoria, Australia - 36.7°S, 147.0°E
There is a very fine line between "amateur astronomy" and "mental illness."
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4.5" f8 Tasco reflector on motorised Alt/Az, 80mm f5 achro refractor on SW EQ1, 5" f9.4 achro refractor, NexImage, Canon 400D
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« Reply #1 on: June 12, 2010, 10:40:23 PM »

FORK ROB! You bloody ripper, great hunting indeed... BTW go a bit wider and you can find the minor planet Pluto.
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Rob_K
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« Reply #2 on: June 12, 2010, 10:55:52 PM »

Thanks Andrew - animation of 15 Eunomia added to first post.

Pluto's a bit out of the field I'm imaging.  Feasible at 200mm (did it last year), but you need a good position away from other stars - tough to get in Sagittarius, LOL!
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Rob - Bright, Victoria, Australia - 36.7°S, 147.0°E
There is a very fine line between "amateur astronomy" and "mental illness."
http://robsastropics.googlepages.com/robsastropics
http://robsastropics.googlepages.com/comets
4.5" f8 Tasco reflector on motorised Alt/Az, 80mm f5 achro refractor on SW EQ1, 5" f9.4 achro refractor, NexImage, Canon 400D
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« Reply #3 on: June 13, 2010, 07:16:03 AM »

Tell ya what, if I ever lose a dot in the middle of a deep starfield, your going to be the first person I call.
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Paul Haese
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« Reply #4 on: July 15, 2010, 10:09:20 AM »

You must be a human blink comparitor. I would never be able to spot something like that. Just not wired that way. Well done.
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