Understanding > Astronomical calculations
Total solar eclipse of the Sun on 21 August 2017
Presentation of the eclipse
Description of the eclipse
The central line begins in the North Pacific, goes through the United States of America, and ends in the North Atlantic ocean. The eclipse is visible from North America. The maximum duration of the centrality is 2m 40.1s.
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 74.3 sec.
Instant of the geocentric conjunction in right ascension : the 21 August 2017 at 18h 13m 10.6s UT.
Julian day : : 2457987.259150
| Characteristics | Values |
|---|---|
| Right ascension of the Sun : | 10h 4m 3.9s. |
| Declination of the Sun : | +11° 51' 43.3". |
| Right ascension of the Moon : | 10h 4m 30.5s. |
| Declination of the Moon : | +12° 16'33.5". |
| Equatorial parallax of the Sun : | 8.7". |
| Equatorial parallax of the Moon : | 58' 55.7". |
| True semi-diameter of the Sun : | 15' 48.7". |
| True semi-diameter of the Moon : | 16' 3.4". |
General circumstances of the eclipse
Magnitude : 1.0306
| Circumstances | UT | Longitude | Latitude |
|---|---|---|---|
| Beginning of the general eclipse | the 21 at 15h 46m 48.3s | ||
| Maximum of the eclipse | the 21 at 18h 25m 28.1s | 87°39.3'W | +36° 58.5' |
| End of the general eclipse | the 21 at 21h 4m 19.7s |
General map of visibility
