Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 03/28/2020 - 06:32

This morning I observed W CYG and miu CEP after astronomic dawn, both of which were ~1/4 magnitude fainter than the established curve. Solar altitude was between -12 and -10˚ at the time. 

Since both are fairly (or very) red, I defocused my binos. Red stars are apparently extra bright in twilight, but the V curve for miu CEP suggests I'm too faint as well.

Do any experienced observers have suggestions for better twilight accuracy? Thanks!

Affiliation
American Association of Variable Star Observers (AAVSO)
Twilight Observing?

Hi,

I generally quit observing variable stars before the start of Nautical Twilight when the solar depression is 12 degrees.

I usually defocus my binoculars a little anyway.

John