SOLAR
PRESENCE
Time tag is followed by a blank, then a solar-presence symbol: '*' Daylight
(refracted solar upper-limb on or above apparent horizon) 'C' Civil
twilight/dawn 'N' Nautical twilight/dawn 'A' Astronomical twilight/dawn
' ' Night OR geocentric ephemeris
LUNAR
PRESENCE WITH TARGET RISE/TRANSIT/SET MARKER
The solar-presence symbol is immediately followed by another marker
symbol: 'm' Refracted upper-limb of Moon on or above apparent horizon
' ' Refracted upper-limb of Moon below apparent horizon OR geocentric
'r' Rise (target body on or above cut-off RTS elevation) 't' Transit
(target body at or past local maximum RTS elevation) 's' Set (target
body on or below cut-off RTS elevation)
Computations
by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System
4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA
information: http://ssd.jpl.nasa.gov/ connect : telnet://ssd.jpl.nasa.gov:6775
(via browser) telnet ssd.jpl.nasa.gov 6775 (via command-line) e-mail
: horizons@ssd.jpl.nasa.gov
Note:
These positions are accurate for the site of the standing stones at
Baltray and will be reasonably accurate for the Boyne Valley sites.