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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 73365.21s
Longitudes are counted positively towards West and negatively towards East.

Conjunction on -2621/5/21 at 3h 38m 8.81s.
Geocentric longitude of Venus	36° 36' 47.200".
Geocentric latitude of Venus	-0° 6' 52.98".
Geocentric longitude of the Sun	36° 36' 47.200".
Geocentric latitude of the Sun	-0° 0' 31.79".
Equatorial parallax of the Sun	8.64".
Equatorial parallax of Venus	30.45".
Semi-diameter true of the Sun	15' 42.7".
Semi-diameter true of Venus	28.89".

Phases	Date and instant in UTC	Position of the contacts		Venus being in the Zenith in
		Longitude	Latitude	Longitude	Latitude
Ingress, exterior contact	the 20 th at 23h 32m 43.6s	+ 84° 6.5'	+ 5° 41.1'	+175° 7.9'	+13° 59.8'
Ingress, interior contact	the 20 th at 23h 48m 31.9s	+ 88° 24.7'	+ 4° 15.3'	+179° 5.9'	+13° 59.5'
Least angular distance	the 21 st at 3h 24m 7.0s	+167° 55.1'	-58° 59.9'	-126° 46.8'	+13° 55.7'
Egress, interior contact	the 21 st at 6h 59m 39.6s	- 0° 15.2'	-49° 47.7'	- 72° 40.1'	+13° 51.9'
Egress, exterior contact	the 21 st at 7h 15m 27.9s	+ 4° 31.2'	-48° 26.2'	- 68° 42.0'	+13° 51.6'

Durations of the general phases

• Duration of the general transit : 7h 42m 44.39s.
• Duration of the transit inside the shadow : 7h 11m 7.71s.

Parameters of the shadow and penumbra cones and minimum elongation

• Semi-diameter of the shadow cone : 41.90 R
• Geocentric distance of the edge of the shadow : 24.61 R
• Geocentric distance of the edge of the penumbra : 27.26 R
• Semi-diameter of the cone of penombra : 44.55 R
• Least topocentric distance : 5' 55.340"

Geocentric phases	Date and instant in UTC	Venus being in the Zenith in		Position Angle P
		Longitude	Latitude
Ingress, exterior contact	the 20 th at 23h 38m 40.3s	+176° 37.4'	+13° 59.7'	+ 84° 42.5'
Ingress, interior contact	the 20 th at 23h 54m 32.6s	-179° 23.5'	+13° 59.4'	+ 86° 14.8'
Least angular distance	the 21 st at 3h 24m 6.4s	-126° 46.9'	+13° 55.7'	---
Egress, interior contact	the 21 st at 6h 53m 39.5s	- 74° 10.5'	+13° 52.0'	+217° 36.4'
Egress, exterior contact	the 21 st at 7h 9m 31.9s	- 70° 11.4'	+13° 51.7'	+219° 8.7'

Durations of the geocentric phases

• Duration of the general transit : 7h 30m 51.61s.
• Duration of the transit of the shadow : 6h 59m 6.87s.
• Least geocentric angular distance : 6' 17.092"

URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusN2621.html Last update : March 4th, 2004.