STF 2404 colours
Posted 22 July 2013 - 08:37 AM
Days are still very long here in the UK but I have managed to do some night time observing during the recent spell of good weather and around me getting used to a new equatorial mount.
On Friday evening I split this nice double at around 150x with my 6" refractor. I made the primary yellowish and the secondary bluish although the spectral type is more yellowish/reddish for both. Perhaps I was a bit biased after having spent some time contemplating Albireo earlier. I thought it looked like a miniature version of Beta Cygni!
If anyone has looked at this one recently, what colours did you see?
Posted 22 July 2013 - 08:53 AM
Posted 22 July 2013 - 11:53 AM
Posted 22 July 2013 - 12:53 PM
Posted 23 July 2013 - 07:53 AM
It's in Aquila (its WDS designation is 18508+1059) close to the north tip of the Eagle (Deneb al Okab / Epsilon & Zeta Aquilae - the latter also being a beautiful double star - although the arabic translation is actually "the tail of the falcon").
Posted 24 July 2013 - 05:51 AM
Posted 24 July 2013 - 07:56 AM
Posted 24 July 2013 - 08:55 AM
Posted 28 July 2013 - 06:11 AM
WDS data: STF 2404: 18:50:45.54 +10:58:35 (J2000), 6.92 - 7.77mv, 181° pa, 3.4" sep, 2010. . Double. Spectrum: K5III-K3III (Bright star) K2 (SAO)
Telescope: C-8, Observatory: Backyard, Date: 2007 Jun 24, Time: 03:00. "Discovered" while sweeping the least hazy part of the sky. Clouded out minutes later. I'm sure this is a very nice pair, if the skies are clear.
Telescope: C-8, Observatory: Backyard, Date: 2007 Aug 06, Time: 22:00 A lovely orange - yellow pair of 7th Mv stars.
Posted 28 July 2013 - 09:09 AM
18508+1059 STF2404 A spectroscopic binary. Composite spectrum, K5III+K3III. .
Posted 02 August 2013 - 05:23 PM
179x: AB split, A is deep yellow, B is pale orange, clearly contrasting colors.
254x: A is golden orange, B is pale orange.
The third object in my observing run, after Alpha and 99 Herculis.