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Date + Time ................................ 20/5/2011 - 18:48 UTC
Location ....................................
"Nunki Observatory" - Skiathos
Optics .........................................
Celestron C 11 HD
Tools .......................................... CCDsoft
Camera ......................................
SBIG ST 10 XE
Exposure Time.........................
Red: 3.8 Hours
Mount ....................................... Paramount
ME
Guiding .................................... Unguided
Processing Details .................. Maxim , CCDsoft , AIP4WIN
More Details ...........................
Environment Temperature : 15 oC Camera Temperature - 1.5 οC
Sky temperature ..................... -12. οC
Notes ........................................ Weather:
6/10 Transparence: 4/6 Humidity : 88 %
Moon Illumination ............... 89%
Target details .........................
A Delta Scuti variable (sometimes termed
dwarf cepheid) is a
variable star which exhibits variations in its
luminosity due to both radial and non-radial pulsations of the
star's surface. Typical brightness fluctuations are from 0.003 to
0.9
magnitudes in
V over a period of a few hours, although the
amplitude and
period of the fluctuations can vary greatly. The stars are
usually A0 to F5
type
giant or
main sequence stars. The high-amplitude Delta Scuti variables
are also called AI Velorum stars. They are the second most
abundant variable source in the Milky Way after white dwarfs.
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