Decrease font size Increase font size Print this page

Understanding > Astronomical calculations

Partial eclipse of the Sun on 1 July 2011

Presentation of the eclipse






Description of the eclipse


The eclipse is visible between Africa and Antarctica.



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 68.1 sec.



Instant of the geocentric conjunction in right ascension : the 1 July 2011 at 9h 5m 32.9s UT.


Julian day : : 2455743.878852

Characteristics Values
Right ascension of the Sun : 6h 40m 1.7s.
Declination of the Sun : +23° 07' 6.0".
Right ascension of the Moon : 6h 39m 2.0s.
Declination of the Moon : +21° 42'6.0".
Equatorial parallax of the Sun  :  8.6".
Equatorial parallax of the Moon : 57' 24.6".
True semi-diameter of the Sun  : 15' 43.9".
True semi-diameter of the Moon : 15' 38.6".


General circumstances of the eclipse



Magnitude : 0.0966

Circumstances UT
Beginning of the general eclipse the 1 at  7h 53m 47.3s
Maximum of the eclipse the 1 at  8h 38m 24.3s
End of the general eclipse the 1 at 9h 22m 45.0s


General map