Solar Eclipse 2017
Purpose
Compute eclipse start, peak, and end times for observer at a selected location. Also compute maximum obscuration.
See how close we come to NASA posted times.
I'm near the Palatine Public Library in Illinois. Here's what NASA shows for my location. Times are UTC:
References
NASA reference for eclipse path and timing.
This US Navy site explains the difference between magnitude and obscuration for an eclipse.
Most of the math for this is taken from the following blog posting and source code.
3.5.4 | packaged by conda-forge | (default, Aug 10 2017, 01:38:41)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)]
Palatine Public Library, 700, North Court, Palatine, Cook County, Illinois, 60067, United States of America
(-88.0366723932833, 42.12225845)
2017 solar eclipse US/Central times for:
Palatine Public Library
700 North Court
Palatine Illinois 60067
United States of America
First contact : 2017-08-21 11:53:23
Max obscuration: 2017-08-21 13:18:46
Max percent : 86.55
Last contact : 2017-08-21 14:41:42
Results
NASA posted times have been converted from UTC to US/Central.
value | NASA | calculations in this worksheet |
---|---|---|
First contact time | 11:54:00 | 11:53:23 |
Maximum obscuration time | 13:19.41 | 13:18:46 |
Maximum obscuration | 87.42% | 86.55% |
Last contact time | 14:42:44 | 14:41:42 |