---

• 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 -2.92s
Longitudes are counted positively towards West and negatively towards East.

Conjunction on 1874/12/9 at 4h 39m 48.21s.
Geocentric longitude of Venus	256° 59' 33.325".
Geocentric latitude of Venus	+0° 14' 0.12".
Geocentric longitude of the Sun	256° 59' 33.325".
Geocentric latitude of the Sun	-0° 0' 0.44".
Equatorial parallax of the Sun	8.93".
Equatorial parallax of Venus	33.27".
Semi-diameter true of the Sun	16' 14.6".
Semi-diameter true of Venus	31.57".

Phases	Date and instant in UTC	Position of the contacts		Venus being in the Zenith in
		Longitude	Latitude	Longitude	Latitude
Ingress, exterior contact	the 9 th at 1h 38m 51.3s	+134° 12.0'	+35° 28.0'	-153° 37.3'	-22° 37.7'
Ingress, interior contact	the 9 th at 2h 6m 33.4s	+144° 31.4'	+40° 12.8'	-146° 39.9'	-22° 37.4'
Least angular distance	the 9 th at 4h 7m 26.3s	-150° 4.0'	+63° 2.5'	-116° 18.6'	-22° 35.8'
Egress, interior contact	the 9 th at 6h 8m 16.8s	- 49° 24.8'	+62° 12.2'	- 85° 57.8'	-22° 34.2'
Egress, exterior contact	the 9 th at 6h 35m 59.0s	- 33° 42.2'	+58° 54.5'	- 79° 0.4'	-22° 33.8'

Durations of the general phases

• Duration of the general transit : 4h 57m 7.72s.
• Duration of the transit inside the shadow : 4h 1m 43.38s.

Parameters of the shadow and penumbra cones and minimum elongation

• Semi-diameter of the shadow cone : 38.75 R
• Geocentric distance of the edge of the shadow : -4.65 R
• Geocentric distance of the edge of the penumbra : -7.24 R
• Semi-diameter of the cone of penombra : 41.34 R
• Least topocentric distance : 13' 25.676"

Geocentric phases	Date and instant in UTC	Venus being in the Zenith in		Position Angle P
		Longitude	Latitude
Ingress, exterior contact	the 9 th at 1h 49m 3.9s	-151° 3.5'	-22° 37.6'	+ 49° 11.9'
Ingress, interior contact	the 9 th at 2h 18m 30.8s	-143° 39.8'	-22° 37.2'	+ 43° 6.3'
Least angular distance	the 9 th at 4h 7m 26.1s	-116° 18.6'	-22° 35.8'	---
Egress, interior contact	the 9 th at 5h 56m 20.3s	- 88° 57.8'	-22° 34.3'	+346° 18.7'
Egress, exterior contact	the 9 th at 6h 25m 47.2s	- 81° 34.1'	-22° 33.9'	+340° 13.1'

Durations of the geocentric phases

• Duration of the general transit : 4h 36m 43.28s.
• Duration of the transit of the shadow : 3h 37m 49.50s.
• Least geocentric angular distance : 13' 49.949"

URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusP1874.html Last update : March 4th, 2004.