Splitting doubles naked-eye.

Staring at Cygnus from my deck in the suburbs of SFO, I noticed two close
stars midway between the Deneb and the bright "left wing" star. The
innermost of these two stars appeared to be a double, naked eye.

I ran it through HNSKY and ECU and they report them as 30 [mag 5] and 31 Cyg
[mag 4] (SAO 49332 and 49337) interesting in their own right, but to the
point, they appear to be just about at my limit for "splitting" doubles
naked eye.

Mizar is easy at 12', these are less than half that, at 5'.

We all have varying visual acuity, and splitting Mizar, as I understand it,
was an eye test for Babylonian archers. Or maybe it was Mesopotanian
machine gunners.

Can you split these (31 and 32) visually? Do you have a favorite "eye test"
pair and their angular separation you can share with us?


Regards,
Etok




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On 22 Sep 2003 05:22:26 GMT, "Etok" wrote:

Do you have a favorite "eye test"
pair and their angular separation you can share with us?

My personal test is the two wider components of epsilon Lyra, the Double Double,
at 3.5'. I split them about half the times I try. Not sure if it's my eyes or
the seeing that varies, but this is clearly at my limit.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

Do you have a favorite "eye test"
pair and their angular separation you can share with us?

I personally like Stephen O'Meara's double test:

Bronze medal: Sigma 1 and 2 Tauri (seperation 7,2')
Silver medal: Kappa 1 and 2 Tauri (seperation 5,6')
Gold medal: 80. and 81. Tauri (seperation 8,0')

The Superman medal: SAO 93975 and PPM 119973 (seperation 4,0')

And as Chris noted, there is also the Epsilon 1 and 2 Lyrae with seperation
of 3,5'. It is quite easy to see this as an elongated star but if you can
see a clear black space between the two, you have real eagle eyes.

And as Chris noted, there is also the Epsilon 1 and 2 Lyrae with seperation
of 3,5'. It is quite easy to see this as an elongated star but if you can
see a clear black space between the two, you have real eagle eyes.

This was easy for me up into my 30s, and I've had kids do it at school star
parties. Now I'm just happy to have reasonably sharp stars with my glasses on.
--
Curtis Croulet
Temecula, California
33° 27'59"N, 117° 05' 53"W

"Curtis Croulet" wrote in message
...
And as Chris noted, there is also the Epsilon 1 and 2 Lyrae with
seperation
of 3,5'. It is quite easy to see this as an elongated star but if you
can
see a clear black space between the two, you have real eagle eyes.

This was easy for me up into my 30s, and I've had kids do it at school
star
parties. Now I'm just happy to have reasonably sharp stars with my
glasses on.
--
Curtis Croulet
Temecula, California
33° 27'59"N, 117° 05' 53"W

I hear that.
Etok



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Chris L Peterson wrote in message . ..

My personal test is the two wider components of epsilon Lyra, the Double Double,
at 3.5'. I split them about half the times I try. Not sure if it's my eyes or
the seeing that varies, but this is clearly at my limit.

Yesterday, I decided to test my eyes too and was surprised to see that
I can easily split Double double, unlike 5 other people that were with
me )). I was even able to see the blackness between them, it wasn't
just an elongated star )! Is there any other double stars with the
separation in the range of 2-4''? I would like to test my limits.

Ante
--
http://astro.fdst.hr

Ah, youth!
--
Curtis Croulet
Temecula, California
33° 27' 59"N, 117° 05' 53"W

And as Chris noted, there is also the Epsilon 1 and 2 Lyrae with seperation
of 3,5'. It is quite easy to see this as an elongated star but if you can
see a clear black space between the two, you have real eagle eyes.


I was sitting out last night waiting for the neighbors to turn out their lights
so I could get busy with the 18"er. As it turns out I noticed the nice wide
naked eye double at the right tip of the Sea Goat (I'm sure it's already been
mentioned here, it is a beauty), and then I worked on E Lyrae for a bit, and
was still able to split it clean (I'm at 43 solar orbits, myself).
rat
~( );

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