Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive ‘M’ shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a ‘W’ shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper. In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest in from September to early November in its characteristic ‘M’ shape. Even in low southern latitudes below 25ºS is can be seen low in the North.
Imaging telescopes or lenses: ASA10N-OK3 10″ f/3.6 Newtonian Astrograph
Mounts: 10Micron GM2000 QCI
Software: IRIS , PixInsight
Resolution: 1792×1211
Locations: Clemensod
Frames: 6×180″
Integration: 0.3 hours
RA center: 19.551 degrees
DEC center: 58.400 degrees
Pixel scale: 2.194 arcsec/pixel
Orientation: 14.103 degrees
Field radius: 0.659 degrees
Аuthor: Bares
Astrophotography of the day of SPONLI, 24.11.2014
, was discovered by S. W. Burnham. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 seconds of arc. There has been no appreciable change in this quintuple system since the first measurements were made in 1875.
, was discovered by S. W. Burnham. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 seconds of arc. There has been no appreciable change in this quintuple system since the first measurements were made in 1875.
