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Understanding > Astronomical calculations
Transit of Mercury on May 9, 2016
- Parameters at the time of the conjunction in longitude.
- General phases.
- Geocentric phases.
- Local conditions for all locations on http://mercure2016.imcce.fr.
Timings are given in Universal Time. The difference between Terrestrial Time
and Universal Time is taken as 82.21s
Longitudes are counted towards West.
Parameters at the time of the conjunction in longitude
| Conjunction on 9 May 2016 at 15h 11m 51.81s. |
|
|---|---|
| Geocentric longitude of Mercury | 49° 25' 1.053".. |
| Geocentric latitude of Mercury | -0° 5' 24.60". |
| Geocentric longitude of the Sun | 49° 25' 1.053". |
| Geocentric latitude of the Sun | -0° 0' 0.67". |
| Equatorial parallax of the Sun | 8.71". |
| Equatorial parallax of Mercury | 15.79". |
| True semi-diameter of the Sun | 15' 50.4". |
| True semi-diameter of Mercury | 6.04". |
General phases
| Phases | Date and timing in UTC |
Position of contacts | Site for which the planet is at zenit |
||
|---|---|---|---|---|---|
| Longitude | Latitude | Longitude | Latitude | ||
| First contact of the penumbra | On May 9 at 11h 10m 11.1s | -103° 21.6' | + 6° 46.2' | - 11° 50.3' | +17° 34.1' |
| First contact of the umbra | On May 9 at 11h 13m 22.8s | -102° 29.3' | + 6° 31.4' | - 11° 2.2' | +17° 34.0' |
| Maximum of transit | On May 9 at 14h 57m 14.0s | - 12° 54.3' | -58° 52.0' | + 45° 9.8' | +17° 29.9' |
| Last contact of the umbra | On May 9 at 18h 40m 50.6s | +173° 21.2' | -43° 3.9' | +101° 18.1' | +17° 25.7' |
| Last contact of the penumbra | On May 9 at 18h 44m 2.4s | +174° 17.6' | -42° 49.8' | + 0° 0.0' | + 0° 0.0' |
Duration of the general phases
- Duration of the general transit : 7h 33m 51.27s.
- Duration of the transit in the umbra : 7h 27m 27.72s.
Parameters of the penumbra and umbra cones and minimum elongation
- Radius of the umbra cone : 133.43 R
- Geocentric distance to the edge of the umbra : 88.42 R
- Geocentric distance to the edge of the penumbra : 90.13 R
- Radius of the penumbra cone : 135.14 R
- Minimum topocentric distance : 5' 11.476"
Geocentric phases
| Geocentric phase | Date and timing in UTC |
Site for which the planet is at zenit |
Pole angle | |
|---|---|---|---|---|
| Longitude | Latitude | |||
| First external contact | On May 9 at 11h 12m 3.3s | - 11° 22.1' | +17° 34.1' | + 83° 5.5' |
| First internal contact | On May 9 at 11h 15m 15.2s | - 10° 33.9' | +17° 34.0' | + 83° 21.2' |
| Maximum of transit | On May 9 at 14h 57m 10.0s | + 45° 8.8' | +17° 29.9' | --- |
| Last internal contact | On May 9 at 18h 38m 58.1s | +100° 49.8' | +17° 25.8' | +224° 11.1' |
| Last external contact | On May 9 at 18h 42m 10.1s | +101° 38.0' | +17° 25.7' | +224° 26.7' |
Duration of the geocentric phases
- Duration of the general transit : 7h 30m 6.78s.
- Duration of the transit of the umbra : 7h 23m 42.87s.
- Minimum angular geocentric distance : 5' 18.537"