Over last four weeks, observed round object in sky with mostly bright white but has flashing red and green lights.

Object is first noticed low in sky east by southeast of Eastport MD.  Over a period of 45-75 minutes, object moves diagonally at 45 degree angle upward in direction of south by southeast. 
4 weeks ago was appearing around 0230 and gone after 90 minutes or so.  Now appearing around 00:30 and not sure how long remains aloft.  Too far of a distance for binoculars or amateur telescope.  Object brighter than stars and appears most nights.  Seems on schedule.  
Location of first appearance and upward direction always same.
We suspect a sighting of Sirius, which is rising in the eastern sky at this time of year, and at the time indicate.  PD