Understanding > Astronomical calculations
Partial eclipse of the Sun on 4 January 2011
Presentation of the eclipse
Description of the eclipse
The eclipse is visible from Europe, the northern half of Africa, the Middle East and the Caucasus.
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 67.6 sec.
Instant of the geocentric conjunction in right ascension : the 4 January 2011 at 9h 15m 12.3s UT.
Julian day : : 2455565.885559
| Characteristics | Values |
|---|---|
| Right ascension of the Sun : | 18h 59m 14.8s. |
| Declination of the Sun : | -22° 44' 21.3". |
| Right ascension of the Moon : | 18h 58m 23.7s. |
| Declination of the Moon : | -21° 46' 1.0". |
| Equatorial parallax of the Sun : | 8.9". |
| Equatorial parallax of the Moon : | 56' 09.6". |
| True semi-diameter of the Sun : | 16' 15.9". |
| True semi-diameter of the Moon : | 15' 18.1". |
General circumstances of the eclipse
Magnitude : 0.8572
| Circumstances | UT |
|---|---|
| Beginning of the general eclipse | the 4 at 6h 40m 11.1s |
| Maximum of the eclipse | the 4 at 8h 50m 34.0s |
| End of the general eclipse | the 4 at 11h 0m 52.2s |
General map
