What scope were you using?
Eta Cas is distinctly yellow in my scopes, a 5" refractor and a 10" D-K
Cassegrain, and the dim companion is a rather deep orange, almost rust color
when seeing is good, 5/10 or better. If you have time, kindly check this
again when you have better seeing. I am most interested in how the
SuperMonos render the color of double stars.
Fountain Hills, AZ
> -----Original Message-----
> From: W. Gondella [mailto:gondella@...]
> Sent: Sunday, August 31, 2003 5:51 PM
> To: email@example.com; Questar@yahoogroups.com
> Subject: [tmboptical] Fw: TMB SuperMono: Preliminary Testing Pt. 2
> In testing the TMB SuperMonocentrics on 8/14, I made the
> following tests and observations:
> DOUBLE STARS: I moved over to Eta Cassiopeiae high in the north
> east to try a double. This is not a hard double at all, I just
> picked it arbitrarily. It was widely split in the comparison
> eyepieces. Neither component exhibited any color, each appearing
> a lifeless pale while. Upon using the TMB eyepieces though, I
> noticed that the primary star had a pale, yellow cast, while the
> secondary star had a slight rosey cast. These colors were very,
> very subtle, but not seen at all in the other eyepieces.
> Checking with Starry Night and Sky Map, the color index is listed
> as .58. Starry Night indicates this is equal to a pale pinkish
> cast. Sky Map Pro displays the star as a pale yellow.
> I did not try looking for any difference in splitting the closest
> doubles at this time.
> I shall examine Mars and the Moon, with conclusions, in Part 3.
> [Non-text portions of this message have been removed]
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