NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Shoemaker
Date: 2019 Mar 23, 10:47 -0700
It appears that the equinox didn't happen instantaneously as far as RA, DEC and observer ecliptic lat / long are concerned - but somewhere between 21:57:50 and 21:58:40
from https://ssd.jpl.nasa.gov/horizons.cgi
Date__(UT)__HR:MN:SC.fff R.A.__(a-apparent)__DEC ObsEcLon ObsEcLat
2019-Mar-20 21:57:40.000 23 59 59.86 -00 00 00.1 359.9994603 0.0001956 2019-Mar-20 21:57:50.000 23 59 59.89 +00 00 00.0 359.9995752 0.0001956 2019-Mar-20 21:58:00.000 23 59 59.91 +00 00 00.2 359.9996902 0.0001956 2019-Mar-20 21:58:10.000 23 59 59.94 +00 00 00.4 359.9998051 0.0001956 2019-Mar-20 21:58:20.000 23 59 59.96 +00 00 00.5 359.9999201 0.0001956 2019-Mar-20 21:58:30.000 23 59 59.99 +00 00 00.7 0.0000350 0.0001956 2019-Mar-20 21:58:40.000 00 00 00.01 +00 00 00.9 0.0001500 0.0001956 2019-Mar-20 21:58:50.000 00 00 00.04 +00 00 01.0 0.0002649 0.0001956
