|
Date + Time ................................
18/7/2013 - 22:41 UTC
Location ....................................
"Nunki Observatory" - Skiathos
Optics .........................................
Celestron C 11 HD
Tools .......................................... THE SKY
X
Camera ......................................
SBIG ST 10 XE
Exposure Time.........................
Lum: 2.8 Hours
Mount ....................................... Paramount
ME
Guiding .................................... Unguided
Processing Details .................. Maxim , CCDsoft , AIP4WIN,
Photoshop CS4
More Details ...........................
Environment Temperature : 23 oC Camera Temperature 10 οC
Sky temperature ..................... -4. οC
Notes ........................................ Weather:
7/10 Transparence: 4/6 Humidity : 63 %
Moon Illumination ............... 78%
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.
|
