797 May the 22nd
- 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 2577.90s
Longitudes are counted positively towards West and negatively towards East.
Parameters at the instant of conjunction in longitude
| Conjunction on 797/5/22 at 7h 59m 7.74s. | |
|---|---|
| Geocentric longitude of Venus | 64° 15' 16.914". |
| Geocentric latitude of Venus | +0° 14' 35.38". |
| Geocentric longitude of the Sun | 64° 15' 16.914". |
| Geocentric latitude of the Sun | -0° 0' 0.73". |
| Equatorial parallax of the Sun | 8.65". |
| Equatorial parallax of Venus | 30.36". |
| Semi-diameter true of the Sun | 15' 44.2". |
| Semi-diameter true of Venus | 28.81". |
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 22 nd at 6h 29m 11.9s | +125° 9.4' | +66° 46.5' | - 81° 22.7' | +21° 23.7' |
| Ingress, interior contact | the 22 nd at 7h 2m 9.6s | +115° 36.0' | +68° 45.2' | - 73° 6.1' | +21° 23.3' |
| Least angular distance | the 22 nd at 8h 31m 16.7s | + 85° 16.4' | +61° 54.0' | - 50° 43.3' | +21° 22.0' |
| Egress, interior contact | the 22 nd at 10h 0m 26.0s | + 83° 39.0' | +44° 29.6' | - 28° 20.1' | +21° 20.7' |
| Egress, exterior contact | the 22 nd at 10h 33m 23.7s | + 87° 22.5' | +38° 19.8' | - 20° 3.5' | +21° 20.2' |
Durations of the general phases
- Duration of the general transit : 4h 4m 11.73s.
- Duration of the transit inside the shadow : 2h 58m 16.31s.
Parameters of the shadow and penumbra cones and minimum elongation
- Semi-diameter of the shadow cone : 42.16 R
- Geocentric distance of the edge of the shadow : -2.25 R
- Geocentric distance of the edge of the penumbra : -4.90 R
- Semi-diameter of the cone of penombra : 44.82 R
- Least topocentric distance : 14' 4.973"
Geocentric phases
| Geocentric phases | Date and instant in UTC | Venus being in the Zenith in | Position Angle P | |
|---|---|---|---|---|
| Longitude | Latitude | |||
| Ingress, exterior contact | the 22 nd at 6h 40m 38.8s | - 78° 30.2' | +21° 23.6' | + 7° 50.1' |
| Ingress, interior contact | the 22 nd at 7h 17m 33.7s | - 69° 14.0' | +21° 23.0' | +359° 35.5' |
| Least angular distance | the 22 nd at 8h 31m 16.5s | - 50° 43.4' | +21° 22.0' | --- |
| Egress, interior contact | the 22 nd at 9h 45m 0.8s | - 32° 12.4' | +21° 20.9' | +322° 4.9' |
| Egress, exterior contact | the 22 nd at 10h 21m 55.7s | - 22° 56.2' | +21° 20.4' | +313° 50.3' |
Durations of the geocentric phases
- Duration of the general transit : 3h 41m 16.88s.
- Duration of the transit of the shadow : 2h 27m 27.05s.
- Least geocentric angular distance : 14' 26.626"
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/VenusP797.html
Last update : March 4th, 2004. |
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