A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2017 Aug 2, 04:23 -0700
Thank you to all commented.
The Herbert Prinz's article from eleven years ago did clarify it all.
Most interesting was to learn that the plane of Earth's orbit wobbles within ~1 arcsecond of its' mean position (I did not know by how much it does deviate, is it degrees or minuscule fraction of a second), also interesting was to see the time difference between all the relevant events (RA==0°, Dec==0° and Lon==0°).