British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Gallery Picture of the Week
Image search

Sirius and the "pup"

Image

Expand image

About this observation
Observer
Leo Aerts
Time of observation
10/10/2018 - 05:00
Object
Sirius
Observing location
Heist op den Berg, Belgium
Equipment
Celestron 14” scope at prime focus
ZWO ASI 290MM webcam
Like This Image
Share

Leo notes that the ‘ key to success’ in observing this close and difficult pair is not transparency, but good seeing conditions.  When the air is calm Sirius B pops up in good contrast to Sirius A.  When seeing deteriorates the companion is not seen.  On October 10th 2018 conditions were perfect.  There was also a reason why he chose the early morning to observe Sirius.  October has warmer night time temperatures than in the middle of winter, and cold night temperature are often disastrous for good seeing conditions.  Sirius also culminated in early October.   Leo used a ZWO AS290 webcam at prime focus at about 5 fps, with a gain of about 80%.  He stacked about 300 images out of 2000.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.