NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Jan Eckert
Date: 2023 May 4, 19:43 -0700
I understand that we should be able to see Venus in daylight starting this month and June and July as well. I plan to use it for daytime celestial fixes in late June if I can get good at finding it.
We're predicting it for for this week. Tomorrow Venus has declination ==26.0° and R.A. (right ascension) of 6:22 ==hours and minutes. To find it, I looked for a star running on the same declination track hours later. I've found two that work, I think.
The star Raslas or Mu Leo is right at the top of the famous "Sickle" pattern in Leo. I can find that one!! That star has a declination of 25.9° and its R.A. is 9:54 ==3.5 hours after Venus. I'll go outside tomorrow night as soon as the Sun has set. Then I plan to wait during twilight for Raslas to be directly above the chimney of my neighbor's house. That's right at perfect SouthWest from my back porch in CT. I'll get my neighbor's chimney in the horizon window of my little Davis sextant. Then I'll find the top of the Sickle on the index. Extrapolating by yesterday's sky that will be at about 8:45 local time here. Then on Saturday or Sunday I stand in the same spot again but 3.5 hours earlier, applying that differential in R.A. I'll line up the sextant's horizon on the chimney again, set the sextant to the same altitude as my Raslas friend. And that should show get me Venus in daylight!
I've got another star for this maneuver. That's Gemma or Alphecca or the Alpha star in the Northern Crown. Its declination is 26.6°. Close enough for my Davis!!! Gemma has R.A. equal to 15:35. If I find its location in the sky tonight at 10:00 then Venus will be there tomorrow a little bit after 12:00 Noon here in central CT.
How are my numbers? Has anyone used Venus this Spring for sights?