1769 June the 3rd and the 4th
- 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 14.88s
Longitudes are counted positively towards West and negatively towards East.
Parameters at the instant of conjunction in longitude
| Conjunction on 1769/6/3 at 22h 2m 37.08s. | |
|---|---|
| Geocentric longitude of Venus | 73° 27' 13.778". |
| Geocentric latitude of Venus | +0° 10' 16.07". |
| Geocentric longitude of the Sun | 73° 27' 13.778". |
| Geocentric latitude of the Sun | -0° 0' 0.03". |
| Equatorial parallax of the Sun | 8.66". |
| Equatorial parallax of Venus | 30.43". |
| Semi-diameter true of the Sun | 15' 45.3". |
| Semi-diameter true of Venus | 28.87". |
General phases
| Phases | Date and instant in UTC |
Position of the contacts | Venus being in the Zenith in | ||
|---|---|---|---|---|---|
| Longitude | Latitude | Longitude | Latitude | ||
| Ingress, exterior contact | the 3 rd at 19h 8m 31.2s | - 9° 25.0' | +48° 1.7' | +107° 31.0' | +22° 39.0' |
| Ingress, interior contact | the 3 rd at 19h 27m 6.7s | - 7° 14.6' | +50° 16.7' | +112° 11.2' | +22° 38.8' |
| Least angular distance | the 3 rd at 22h 25m 20.3s | - 59° 4.7' | +63° 2.4' | +156° 56.7' | +22° 36.5' |
| Egress, interior contact | the 4 th at 1h 23m 35.7s | - 58° 28.9' | +23° 9.9' | -158° 17.4' | +22° 34.1' |
| Egress, exterior contact | the 4 th at 1h 42m 11.2s | - 55° 4.5' | +20° 37.6' | -153° 37.3' | +22° 33.9' |
Durations of the general phases
- Duration of the general transit : 6h 33m 40.03s.
- Duration of the transit inside the shadow : 5h 56m 28.93s.
Parameters of the shadow and penumbra cones and minimum elongation
- Semi-diameter of the shadow cone : 42.10 R
- Geocentric distance of the edge of the shadow : -14.11 R
- Geocentric distance of the edge of the penumbra : -16.76 R
- Semi-diameter of the cone of penombra : 44.75 R
- Least topocentric distance : 9' 47.638"
Geocentric phases
| Geocentric phases | Date and instant in UTC | Venus being in the Zenith in | Position Angle P | |
|---|---|---|---|---|
| Longitude | Latitude | |||
| Ingress, exterior contact | the 3 rd at 19h 15m 25.8s | +109° 15.2' | +22° 38.9' | + 35° 40.2' |
| Ingress, interior contact | the 3 rd at 19h 34m 18.9s | +113° 59.7' | +22° 38.7' | + 32° 43.3' |
| Least angular distance | the 3 rd at 22h 25m 22.3s | +156° 57.2' | +22° 36.5' | --- |
| Egress, interior contact | the 4 th at 1h 16m 22.9s | -160° 6.1' | +22° 34.2' | +296° 13.6' |
| Egress, exterior contact | the 4 th at 1h 35m 16.0s | -155° 21.5' | +22° 34.0' | +293° 16.7' |
Durations of the geocentric phases
- Duration of the general transit : 6h 19m 50.23s.
- Duration of the transit of the shadow : 5h 42m 4.06s.
- Least geocentric angular distance : 10' 9.347"
Send your suggestion to the author of the notes : Patrick Rocher, rocher@imcce.fr
|
URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusP1769.html
Last update : March 4th, 2004. |
 |