Posted 18 June 2013 - 08:18 PM
Posted 18 June 2013 - 10:32 PM
Flammarion (19th century) called them "golden yellow and lilac"; Sissy Haas in her book has "white and bluish sea green" with a 60mm refractor; she quotes TW Webb with "Pale yellow; pale copper". I looked at it with a 7-inch apo refractor (AP) and saw "white and orange". On the other hand, I see the companion of Antares as definitely "green", so green is a colour I sometimes see in stars.
Apparently, not everyone sees a colour contrast here. Hartung calls the stars "pale yellow". Burnham, in the Celestial Handbook, remarks on this failure to see colour contrast, mentioning that TW Webb said John Herschel saw no colour contrast.
Burnham also quotes RH Allen - "flushed white and pale lilac"; Agnes Clerke "pale yellow and fawn"; so not a high difference there. Baron Dembowski called the fainter star "pale olive blue" - odd, says Burnham, who prefers Webb's "pale copper" because it agrees with the spectral type (F0).
It might come down to choosing your colour preference (or your eyes doing it for you).
Posted 18 June 2013 - 11:27 PM
Posted 19 June 2013 - 01:23 AM
It does appears slightly greenish to me in my 8 inch reflector--as the attached photo through this instrument suggests.
Posted 19 June 2013 - 01:24 AM
Posted 19 June 2013 - 05:15 AM
Posted 19 June 2013 - 05:18 AM
Posted 23 June 2013 - 04:02 PM
A always appeared white to me, while B was yellow(ish) in an 8" SCT and light blue in a 12".
That's how it appeared in my telescope when I split this double 6 weeks ago - a white primary with a yellowish companion. A week later, when I split the double a second time, the primary was still white, but the companion also appeared white.
Posted 03 July 2013 - 06:58 AM