Understanding > Astronomical calculations
Annular eclipse of the Sun on 20/21 May 2012
Presentation of the eclipse
Description of the eclipse
The central line begins in China, passes over Japan, North Pacific and ends in the southern United States. The maximum duration of the centrality is 5m 46.4 s.
Elements of the eclipse
Ephemeris used to calculate positions of the Sun and Earth are the ephemeris Newcomb/ILE. For this calculation the value of TE-TU was exceptionally forced at 69.0 sec.
Instant of the geocentric conjunction in right ascension : the 20 May 2012 at 23h 59m 9.1s UT.
Julian day : : 2456068.499411
| Characteristics | Values |
|---|---|
| Right ascension of the Sun : | 3h 52m 43.0s. |
| Declination of the Sun : | +20° 13' 15.2". |
| Right ascension of the Moon : | 3h 52m 30.7s. |
| Declination of the Moon : | +20° 39' 6.0". |
| Equatorial parallax of the Sun : | 8.7". |
| Equatorial parallax of the Moon : | 54' 01.6". |
| True semi-diameter of the Sun : | 15' 48.1". |
| True semi-diameter of the Moon : | 14' 43.3". |
General circumstances of the eclipse
Magnitude : 0.9190
| Circumstances | UT | Longitude | Latitude |
|---|---|---|---|
| Beginning of the general eclipse | the 20 at 20h 56m 7.0s | ||
| Maximum of the eclipse | the 20 at 23h 52m 46.6s | 176 °16.8'E | +49° 5.3' |
| End of the general eclipse | the 21 at 2h 49m 21.5s |
General map
