1631 December the 7th
- 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 82.81s
Longitudes are counted positively towards West and negatively towards East.
Parameters at the instant of conjunction in longitude
| Conjunction on 1631/12/7 at 5h 55m 58.56s. | |
|---|---|
| Geocentric longitude of Venus | 254° 59' 33.763". |
| Geocentric latitude of Venus | +0° 15' 51.69". |
| Geocentric longitude of the Sun | 254° 59' 33.763". |
| Geocentric latitude of the Sun | +0° 0' 0.39". |
| Equatorial parallax of the Sun | 8.93". |
| Equatorial parallax of Venus | 33.30". |
| Semi-diameter true of the Sun | 16' 15.0". |
| Semi-diameter true of Venus | 31.59". |
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 7 th at 3h 36m 19.6s | +171° 3.0' | +45° 9.9' | -124° 7.0' | -22° 24.7' |
| Ingress, interior contact | the 7 th at 4h 22m 59.7s | -167° 41.8' | +53° 31.7' | -112° 23.9' | -22° 24.0' |
| Least angular distance | the 7 th at 5h 19m 27.1s | -133° 42.2' | +62° 44.6' | - 98° 13.2' | -22° 23.3' |
| Egress, interior contact | the 7 th at 6h 15m 51.9s | - 88° 12.3' | +67° 12.2' | - 84° 3.2' | -22° 22.5' |
| Egress, exterior contact | the 7 th at 7h 2m 32.1s | - 50° 37.8' | +65° 41.9' | - 72° 20.1' | -22° 21.9' |
Durations of the general phases
- Duration of the general transit : 3h 26m 12.55s.
- Duration of the transit inside the shadow : 1h 52m 52.19s.
Parameters of the shadow and penumbra cones and minimum elongation
- Semi-diameter of the shadow cone : 38.72 R
- Geocentric distance of the edge of the shadow : -0.17 R
- Geocentric distance of the edge of the penumbra : -2.76 R
- Semi-diameter of the cone of penombra : 41.31 R
- Least topocentric distance : 15' 15.030"
Geocentric phases
| Geocentric phases | Date and instant in UTC | Venus being in the Zenith in | Position Angle P | |
|---|---|---|---|---|
| Longitude | Latitude | |||
| Ingress, exterior contact | the 7 th at 3h 51m 37.6s | -120° 16.5' | -22° 24.5' | + 36° 38.5' |
| Ingress, interior contact | the 7 th at 4h 58m 17.7s | -103° 32.0' | -22° 23.6' | + 20° 51.0' |
| Least angular distance | the 7 th at 5h 19m 28.9s | - 98° 12.8' | -22° 23.3' | --- |
| Egress, interior contact | the 7 th at 5h 40m 34.9s | - 92° 54.9' | -22° 23.0' | + 10° 14.2' |
| Egress, exterior contact | the 7 th at 6h 47m 15.0s | - 76° 10.4' | -22° 22.1' | +354° 26.7' |
Durations of the geocentric phases
- Duration of the general transit : 2h 55m 37.34s.
- Duration of the transit of the shadow : 0h 42m 17.17s.
- Least geocentric angular distance : 15' 39.328"
Send your suggestion to the author of the notes : Patrick Rocher, rocher@imcce.fr
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URL: http://www.imcce.fr/ephem/passage_eng/html_passage/VenusP1631.html
Last update : March 4th, 2004. |
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