Interesting colour observations Bob. I must make more reference to spectral information.
I certainly find it hard to discern colour variants in the faint companions.
Quote:
Originally Posted by Tropo-Bob
I observed these last night, which was my first cloud free night for this year. I used my Tak FC 100D.
Gamma Vol. https://en.wikipedia.org/wiki/Gamma_Volantis
Using a Delite 15mm (50x):- A widely separated, unequal pair, of about 2 mags different. Primary had light touch of orange, secondary looked more blue/white.
Epsilon Volantis https://en.wikipedia.org/wiki/Epsilon_Volantis
Delite 7mm (105x)- Unequal stars. A delicate and pleasing pair of about 3 mags difference. Primary white, secondary orange. Separation was not immediately obvious at 50x.
Kappa Volantis (Triple) https://en.wikipedia.org/wiki/Kappa_Volantis
Panoptic 24mm (30x)- A very wide pair of bright, near equal white stars, with a third star of about 2 mags fainter extending the line in a bow shape. The separation to the third star, which had an orange tint is about ½ that of the bright pair.
Remarks:- When I compare the colours that I observed with the spectral classes, I seem to have estimated the colours of the primaries correctly, but not the colours of the secondaries (except Kappa, where the 3rd star has no information). It looks like something I need to work upon, or perhaps the secondaries were just too faint for me to estimate reliably. |