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• Parameters at the instant of the conjunction in longitude.
• General phases.
• Geocentric phases.
• Back to the canon of the transits of Venus.

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 64930.17s
Longitudes are counted positively towards West and negatively towards East.

Conjunction on -2378/5/21 at 9h 14m 58.79s.
Geocentric longitude of Venus	38° 52' 14.527".
Geocentric latitude of Venus	-0° 8' 6.84".
Geocentric longitude of the Sun	38° 52' 14.527".
Geocentric latitude of the Sun	-0° 0' 25.61".
Equatorial parallax of the Sun	8.64".
Equatorial parallax of Venus	30.43".
Semi-diameter true of the Sun	15' 42.7".
Semi-diameter true of Venus	28.87".

Phases	Date and instant in UTC	Position of the contacts		Venus being in the Zenith in
		Longitude	Latitude	Longitude	Latitude
Ingress, exterior contact	the 21 st at 5h 16m 13.2s	+171° 24.4'	+ 0° 12.2'	- 98° 56.3'	+14° 42.6'
Ingress, interior contact	the 21 st at 5h 32m 42.0s	+175° 59.6'	- 1° 35.7'	- 94° 48.1'	+14° 42.3'
Least angular distance	the 21 st at 8h 58m 3.3s	-106° 52.2'	-59° 10.9'	- 43° 14.8'	+14° 38.7'
Egress, interior contact	the 21 st at 12h 23m 21.9s	+ 76° 39.6'	-53° 57.8'	+ 8° 17.9'	+14° 35.0'
Egress, exterior contact	the 21 st at 12h 39m 50.8s	+ 82° 5.0'	-52° 17.6'	+ 12° 26.1'	+14° 34.7'

Durations of the general phases

• Duration of the general transit : 7h 23m 37.58s.
• Duration of the transit inside the shadow : 6h 50m 39.89s.

Parameters of the shadow and penumbra cones and minimum elongation

• Semi-diameter of the shadow cone : 41.94 R
• Geocentric distance of the edge of the shadow : 21.00 R
• Geocentric distance of the edge of the penumbra : 23.65 R
• Semi-diameter of the cone of penombra : 44.59 R
• Least topocentric distance : 7' 14.541"

Geocentric phases	Date and instant in UTC	Venus being in the Zenith in		Position Angle P
		Longitude	Latitude
Ingress, exterior contact	the 21 st at 5h 22m 24.4s	- 97° 23.1'	+14° 42.5'	+ 90° 27.5'
Ingress, interior contact	the 21 st at 5h 38m 59.9s	- 93° 13.2'	+14° 42.2'	+ 92° 24.4'
Least angular distance	the 21 st at 8h 58m 2.4s	- 43° 15.0'	+14° 38.7'	---
Egress, interior contact	the 21 st at 12h 17m 4.8s	+ 6° 43.2'	+14° 35.1'	+212° 36.2'
Egress, exterior contact	the 21 st at 12h 33m 40.4s	+ 10° 53.1'	+14° 34.8'	+214° 33.1'

Durations of the geocentric phases

• Duration of the general transit : 7h 11m 16.07s.
• Duration of the transit of the shadow : 6h 38m 4.91s.
• Least geocentric angular distance : 7' 36.278"

URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusN2378.html Last update : March 4th, 2004.