First time Antares split
Posted 31 May 2013 - 10:44 AM
Double stars are cool.
Posted 31 May 2013 - 10:48 AM
Posted 31 May 2013 - 10:51 AM
In my hands, the secondary is greenish. I always find this target is a good indicator of seeing conditions.
Posted 31 May 2013 - 11:42 AM
Posted 31 May 2013 - 02:44 PM
Posted 01 June 2013 - 07:01 AM
Posted 03 June 2013 - 07:51 AM
Congrats here. The glare off that primary is very substantial. Good work!
Posted 03 June 2013 - 12:33 PM
I split Antares two years ago ,in the summer of 2011,with my 125mm F/7 Dobsonian ,at 216x,using a Solid Ramsden 8mm eyepiece and a 2x Japanese Barlow.
The SR 8mm is a modern variation of Tolles eyepiece.
Apart of good seeing and good telescope,I believe the use of simple eyepieces/minimum air-to-glass surfaces is helpful on such objects.
At Antares I remember to see the same colors of the companion like you and Paul/C_Moon.
Thank you for posting this,this is the time to test my 8 inch Dobsonian on Antares.
Posted 30 June 2013 - 11:14 PM
Then a few nights ago I was looking at planets and the moon and Antares beckoned. So I swung my 8SE around. Couldn't see B at all in the glare from A. The only filter I had in my EP kit was my Baader UHC - what the heck. At 200X there was a red star and a green star overlapping. Resolved, but not split. Happy nonetheless. Going to 400X didn't help at all.
Then the clouds moved in.
A whole new story tonight - this time with my ES102ED. No split at first. Get out the UHC filter and BANG: two separate stars (red and green) with a black space between them. My first time for my favourite star. Best at 140X although I did get up to 300X. That was fun! The refractor really does a nice job. on the doubles.
You may want to try the UHC trick. If anyone else has tried it, I'd like to here about it.
Posted 01 July 2013 - 05:47 AM
Posted 01 July 2013 - 06:36 AM
Myself and other observers have tried UHC filters and have found out that some of them show a secondary reflection of a bright star which will make you think you split a double. I'd suggest you try the filter on a bright known single star and see what happens. I personally don't trust UHC filters for splitting doubles. Hopefully you've been able to split Antares.
Several years ago, I saw the exact same thing Rich describes with my 8 inch reflector using a Baader UHC filter--I cant remember which star exactly but do remember it was one that had a very bright primary (such as Antares).
This double is tricky for me even with the 15 inch. Early in the night I can easily see the secondary at 200x or so, but then later in the night I cannot (when conditions should be better). Oddly enough, if the seeing is very good, I can see the companion quite clearly at 150x with the 8 inch. It seems sky conditions are the most important factor for Antares. I seem to recall most of my positive sightings happening at the end of twilight versus in the deep dark of late night--maybe that is the trick?
I did make a very preliminary finding recently using an off axis mask with my 15 to afford an unobstructed 6 inch telescope in which the secondary appeared a bit better to see due to overall dimming of the primary.
Try as I may, I have not been able to obtain a good image of the secondary in any scope with any combination of lenses or camera conditions. Antares is ridiculously difficult to photograph.
You should keep trying this one, though, as you will may see the companion when you least suspect it.
Posted 01 July 2013 - 09:34 PM
I will also keep trying with other filters. Dimming the bright primary is difficult. Antares is always a joy to look at. I'll let you know of any development.
Posted 02 July 2013 - 12:30 AM
The biggest problem with Antares is seeing conditions; good air steadiness is essential, and for observers a long way north that's harder to get because Antares stays low in the sky. On the steadiest nights, I've seen the companion (no filter needed) at only 100x, neatly separated from the primary.
Posted 02 July 2013 - 05:05 AM
Posted 04 July 2013 - 07:02 PM
Posted 08 July 2013 - 10:06 AM
Posted 08 July 2013 - 02:13 PM
Whaddaya need to split Antares? I have a 100mm ED refractor, but I have feeling that's not big enough. Of course, I could look it up too. Congrats on that nice split.
Posted 08 July 2013 - 03:21 PM
I've obtained several nice splits with a 100mm telescope. Suggest 200-250X.
Posted 08 July 2013 - 06:57 PM
I tried using a semi-apo filter with no luck for 20 mins before removing it. Antares was pretty much overhead too.
I'd love to see this in better conditions.
Posted 08 July 2013 - 08:47 PM
Posted 09 July 2013 - 10:06 PM
Posted 09 July 2013 - 10:11 PM
Posted 13 July 2013 - 04:03 PM