Table 2. Shadow Contacts and Circumstances,
Total Solar Eclipse of 1997 March 9

                                                             T =    62.1 s
                                                                =  000°15.5´E

                            Terrestrial
                             Dynamical               Ephemeris      True
                               Time      Latitude    Longitude*   Longitude**
                             h  m  s
 External/Internal
Contacts of Penumbra:  P1   23:17:38.3   19°17.7´N   104°52.1´E   105°07.6´E
                       P4   03:31:50.2   54°08.4´N   146°34.2´W   146°18.6´W
     Extreme
North/South Limits
of Penumbral Path:     N1   23:51:09.0   04°59.8´N   095°17.2´E   095°32.8´E
                       S1   02:58:23.6   39°57.6´N   135°44.4´W   135°28.9´W

 External/Internal
 Contacts of Umbra:    U1   00:42:04.9   48°15.2´N   087°16.0´E   087°31.5´E
                       U2   00:46:59.1   50°44.5´N   086°30.6´E   086°46.2´E
                       U3   02:02:20.8   83°53.7´N   165°46.1´W   165°30.5´W
                       U4   02:07:13.8   82°00.8´N   153°32.9´W   153°17.3´W
     Extreme
North/South Limits
  of Umbral Path:      N1   00:46:47.6   50°50.6´N   086°34.8´E   086°50.3´E
                       S1   00:42:18.1   48°08.4´N   087°11.5´E   087°27.0´E
                       N2   02:02:32.3   83°57.7´N   166°31.3´W   166°15.8´W
                       S2   02:07:00.8   81°55.3´N   153°02.6´W   152°47.1´W

 Extreme Limits
 of Center Line:       C1   00:44:28.2   49°27.2´N   086°53.4´E   087°09.0´E
                       C2   02:04:51.1   82°58.1´N   158°32.7´W   158°17.2´W

   Instant of 
Greatest Eclipse:      G0   01:24:50.6   57°46.9´N   130°25.2´E   130°40.8´E

Circumstances at
Greatest Eclipse:   SunŐs Altitude =  22.8°         Path Width = 356.1 km
                     SunŐs Azimuth = 145.8°   Central Duration =  02m49.6s
* Ephemeris Longitude is the terrestrial dynamical longitude assuming a uniformly rotating Earth.

** True Longitude is calculated by correcting the Ephemeris Longitude for the non-uniform rotation of Earth.

(T.L. = E.L. - 1.002738*T/240, where T (in seconds) = TDT - UT)

Note: Longitude is measured positive to the East.

Since T is not known in advance, the value used in the predictions is an extrapolation based on pre-1994 measurements. Nevertheless, the actual value is expected to fall within ±0.3 seconds of the estimated T used here.

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