Understanding > Astronomical calculations
Annular eclipse of the Sun on 15 January 2010
Presentation of the eclipse
Description of the eclipse
The central line begins in Africa goes through the Indian Ocean and ends in China. The maximum duration of the centrality is 11m 58s.
Elements of the eclipse
To account for differences between the optical center and the center of mass of the Moon, positions of the Moon have been corrected of 0.50" in longitude and -0.25" in latitude.
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 66.6 sec.
Instant of the geocentric conjunction in right ascension : the 15 January 2009 at 7h 20m 19.8s UT.
Julian day : : 2455211.805785
| Characteristics | Values |
|---|---|
| Right ascension of the Sun : | 19h 47m 51.0s. |
| Declination of the Sun : | -21° 07' 38.9". |
| Right ascension of the Moon : | 19h 47m 25.2s. |
| Declination of the Moon : | -20° 46'54.6". |
| Equatorial parallax of the Sun : | 8.9". |
| Equatorial parallax of the Moon : | 54' 05.3". |
| True semi-diameter of the Sun : | 16' 15.5". |
| True semi-diameter of the Moon : | 14' 44.3". |
General circumstances of the eclipse
Magnitude : 0.9190
| Circumstances | UT | Longitude | Latitude |
|---|---|---|---|
| Beginning of the general eclipse | the 15 at 4h 5m 26.4s | ||
| Maximum of the eclipse | the 15 at 7h 6m 31.5s | 69 °18,0'E | +1° 38,0' |
| End of the general eclipse | the 15 at 10h 7m 32.8s |
General map
