Here's a subtle colored pair in Aries, Struve 174, WDS 01501+2217. The Stelle Doppie listing is here.
I observed this on my annual "Birthday Session" this past September 22/23, 2017 at our HAA Site on the summit. I was observing with a Celestron C925/CGEM on a pier. For the Low Power view I used a 2" Explore Scientific 18mm at 130X and for the High Power view I used a new Tele Vue Delos 6mm at 392X.
There are some very dim stars in the Low Power view and I'm not sure if they are correct. SAO 74969, Mag. 8.5, anchors the position in the Low Power view. John Nanson's Star Splitters post from January, 2014 can be found here. His sketch is quite similar to mine although the observed colors, as they sometimes do with all of us, come into question. John emailed me and said, "The primary is G3 and the secondary is B3. So what we should be seeing according to those classifications is yellow and bluish-white. But when two stars are that close together, the colors tend to blend together to some degree." I saw the primary as yellow and the companion as silver/blue. The WX conditions were deteriorating and a pronounced airy disc surrounded the brighter stars. Sissy Haas in her book, "Double Stars for Small Telescopes" writes that the pair are "bright Sun yellow and pale ocean blue"; Webb says, "Gold, very blue," Smyth, "Topaz yellow, smalt blue."
What colors do you see?
The sketch was rendered with a #2 lead pencil on white Log paper, scanned and reworked in GIMP. (A larger file of this sketch is in MauiGazer's Double Star Gallery).
Edited by mauigazer, 13 October 2017 - 01:17 PM.