I am wrong. I quoted the time listed in the RASC Observers Guide wrong. They
list 21:19 UT. Close enough for sundials.
Regards, Roger
From: Jos Kint
Sent: Wednesday, September 23, 2009 11:29 AM
To: sundial@uni-koeln.de
Subject: exact time of 2009 Autumn equinox
Hello Roger Bailey
Dear Jos,
You raise an interesting point...
> According to the United States Naval Observatory
> ... the 2009 equinox falls on sept 22 at 21:18:00 UT.
> This is 61 minutes different from your value.
> Who is right?
I would use the USNO time myself but your question
isn't as easy as it seems...
Hello Roger Bailey,
According to the United States Naval Observatory (
http://aa.usno.navy.mil/data/docs/EarthSeasons.php) the 2009 equinox falls on
sept 22 at 21:18:00 UT. This is 61 minutes different from your value. Who is
right?
Jos Kint
Eeuwfeestlaan 38
9840 De Pinte
Tel: 09.282.57.61
GS
