-1649 May the 22nd and the 23rd
- 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 42749.97s
Longitudes are counted positively towards West and negatively towards East.
Parameters at the instant of conjunction in longitude
| Conjunction on -1649/5/23 at 1h 26m 9.45s. | |
|---|---|
| Geocentric longitude of Venus | 45° 39' 38.126". |
| Geocentric latitude of Venus | -0° 11' 58.22". |
| Geocentric longitude of the Sun | 45° 39' 38.126". |
| Geocentric latitude of the Sun | -0° 0' 13.69". |
| Equatorial parallax of the Sun | 8.64". |
| Equatorial parallax of Venus | 30.38". |
| Semi-diameter true of the Sun | 15' 42.7". |
| Semi-diameter true of Venus | 28.82". |
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 22h 2m 31.1s | + 68° 47.5' | -18° 9.6' | +152° 43.1' | +16° 42.1' |
| Ingress, interior contact | the 22 nd at 22h 23m 29.6s | + 75° 12.8' | -21° 35.8' | +157° 59.0' | +16° 41.8' |
| Least angular distance | the 23 rd at 1h 0m 18.7s | +138° 51.8' | -59° 44.9' | -162° 38.6' | +16° 39.1' |
| Egress, interior contact | the 23 rd at 3h 37m 3.6s | - 78° 32.8' | -66° 43.8' | -123° 17.4' | +16° 36.4' |
| Egress, exterior contact | the 23 rd at 3h 58m 2.2s | - 67° 14.8' | -64° 10.9' | -118° 1.4' | +16° 36.1' |
Durations of the general phases
- Duration of the general transit : 5h 55m 31.18s.
- Duration of the transit inside the shadow : 5h 13m 34.00s.
Parameters of the shadow and penumbra cones and minimum elongation
- Semi-diameter of the shadow cone : 42.04 R
- Geocentric distance of the edge of the shadow : 9.98 R
- Geocentric distance of the edge of the penumbra : 12.63 R
- Semi-diameter of the cone of penombra : 44.69 R
- Least topocentric distance : 11' 15.280"
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 22h 10m 15.9s | +154° 39.8' | +16° 42.0' | +110° 10.3' |
| Ingress, interior contact | the 22 nd at 22h 31m 48.1s | +160° 4.2' | +16° 41.6' | +114° 2.3' |
| Least angular distance | the 23 rd at 1h 0m 18.6s | -162° 38.7' | +16° 39.1' | --- |
| Egress, interior contact | the 23 rd at 3h 28m 46.3s | -125° 22.2' | +16° 36.6' | +194° 43.7' |
| Egress, exterior contact | the 23 rd at 3h 50m 18.5s | -119° 57.8' | +16° 36.2' | +198° 35.6' |
Durations of the geocentric phases
- Duration of the general transit : 5h 40m 2.54s.
- Duration of the transit of the shadow : 4h 56m 58.23s.
- Least geocentric angular distance : 11' 36.963"
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/VenusN1649.html
Last update : March 4th, 2004. |
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