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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 39300.17s
Longitudes are counted positively towards West and negatively towards East.

Conjunction on -1520/11/21 at 0h 31m 5.80s.
Geocentric longitude of Venus	226° 59' 51.422".
Geocentric latitude of Venus	+0° 14' 55.40".
Geocentric longitude of the Sun	226° 59' 51.422".
Geocentric latitude of the Sun	+0° 0' 12.71".
Equatorial parallax of the Sun	8.95".
Equatorial parallax of Venus	33.33".
Semi-diameter true of the Sun	16' 17.2".
Semi-diameter true of Venus	31.62".

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 21h 43m 34.5s	+ 68° 29.4'	+30° 15.3'	+147° 43.0'	-17° 1.6'
Ingress, interior contact	the 20 th at 22h 14m 52.2s	+ 79° 3.9'	+36° 19.0'	+155° 34.3'	-17° 1.1'
Least angular distance	the 20 th at 23h 57m 39.9s	+123° 14.2'	+59° 22.2'	-178° 37.2'	-16° 59.2'
Egress, interior contact	the 21 st at 1h 40m 26.8s	-152° 9.9'	+72° 40.4'	-152° 49.0'	-16° 57.4'
Egress, exterior contact	the 21 st at 2h 11m 44.5s	-123° 42.1'	+71° 28.5'	-144° 57.6'	-16° 56.9'

Durations of the general phases

• Duration of the general transit : 4h 28m 9.97s.
• Duration of the transit inside the shadow : 3h 25m 34.69s.

Parameters of the shadow and penumbra cones and minimum elongation

• Semi-diameter of the shadow cone : 38.79 R
• Geocentric distance of the edge of the shadow : -3.03 R
• Geocentric distance of the edge of the penumbra : -5.62 R
• Semi-diameter of the cone of penombra : 41.39 R
• Least topocentric distance : 14' 7.492"

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 21h 54m 54.2s	+150° 33.6'	-17° 1.4'	+ 56° 4.2'
Ingress, interior contact	the 20 th at 22h 29m 7.7s	+159° 9.1'	-17° 0.8'	+ 48° 37.7'
Least angular distance	the 20 th at 23h 57m 40.3s	-178° 37.1'	-16° 59.2'	---
Egress, interior contact	the 21 st at 1h 26m 12.9s	-156° 23.4'	-16° 57.7'	+ 3° 1.0'
Egress, exterior contact	the 21 st at 2h 0m 26.3s	-147° 47.8'	-16° 57.1'	+355° 34.5'

Durations of the geocentric phases

• Duration of the general transit : 4h 5m 32.17s.
• Duration of the transit of the shadow : 2h 57m 5.16s.
• Least geocentric angular distance : 14' 31.805"

URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusN1520.html Last update : March 4th, 2004.