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1786 May the 4th



All the instants are given in Universal Time, for the present date the value of the difference between the Terrestrial Time TT and the Universal Time UT is taken as 16.86s
Longitudes are counted positively towards West and negatively towards East.

Parameters at the instant of conjunction in longitude


Conjunction on 1786/5/4 at 5h 9m 55.10s.
Geocentric longitude of Mercury 43° 49' 53.860".
Geocentric latitude of Mercury +0° 11' 40.23".
Geocentric longitude of the Sun 43° 49' 53.860".
Geocentric latitude of the Sun -0° 0' 0.07".
Equatorial parallax of the Sun 8.71".
Equatorial parallax of Mercury 15.74".
True semi-diameter of the Sun 15' 50.8".
True semi-diameter of Mercury 6.02".


General phases

Phases Date and instant
in UTC
Position of the contacts Mercury being in the Zenith in
Longitude Latitude Longitude Latitude
Ingress, exterior contact the 4 th at 2h 53m 39.7s + 92° 4.9' +67° 22.8' -135° 47.9' +16° 14.3'
Ingress, interior contact the 4 th at 2h 57m 58.0s + 91° 45.9' +67° 54.0' -134° 43.1' +16° 14.2'
Least angular distance the 4 th at 5h 41m 13.8s + 23° 36.0' +58° 31.3' - 93° 43.8' +16° 11.1'
Egress, interior contact the 4 th at 8h 23m 59.8s + 41° 55.5' +18° 9.6' - 52° 52.1' +16° 8.0'
Egress, exterior contact the 4 th at 8h 28m 18.2s + 42° 46.3' +17° 26.6' - 51° 47.2' +16° 7.9'

Durations of the general phases

  • Duration of the general transit : 5h 34m 38.54s.
  • Duration of the transit inside the shadow : 5h 26m 1.86s.

Parameters of the shadow and penumbra cones and minimum elongation

  • Semi-diameter of the shadow cone : 134.34 R
  • Geocentric distance of the edge of the shadow : -36.37 R
  • Geocentric distance of the edge of the penumbra : -38.08 R
  • Semi-diameter of the cone of penombra : 136.06 R
  • Least topocentric distance : 11' 21.992"

Geocentric phases

Geocentric phases Date and instant in UTC Mercury being in the Zenith in Position Angle P
LongitudeLatitude
Ingress, exterior contact the 4 th at 2h 56m 9.5s -135° 10.3' +16° 14.3' + 16° 11.7'
Ingress, interior contact the 4 th at 3h 0m 29.9s -134° 4.9' +16° 14.2' + 15° 26.1'
Least angular distance the 4 th at 5h 40m 59.6s - 93° 47.4' +16° 11.1' ---
Egress, interior contact the 4 th at 8h 21m 27.3s - 53° 30.4' +16° 8.0' +289° 15.2'
Egress, exterior contact the 4 th at 8h 25m 47.7s - 52° 25.0' +16° 8.0' +288° 29.5'

Durations of the geocentric phases

  • Duration of the general transit : 5h 29m 38.25s.
  • Duration of the transit of the shadow : 5h 20m 57.41s.
  • Least geocentric angular distance : 11' 29.006"


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URL: http://www.imcce.fr/ephem/passage_eng/html_passage/MercureP1786.html
Last update : March 22nd, 2004.