LUNAR-ECLIPSE PLANNING NOTE
Purpose: Convert one event's contact times and plan a local observation.
Guide: https://yenra.com/wiki/Winter_solstice_lunar_eclipse/
Predictions: https://eclipse.gsfc.nasa.gov/lunar.html
Historical source: https://eclipse.gsfc.nasa.gov/OH/OH2010.html#LE2010Dec21T

Choose an event and retain its own prediction, map and stated time standard.
Convert using the UTC offset applicable at your location ON THAT DATE.
Record a calendar date beside every local time. Check Moon altitude and direction
with a location-specific ephemeris, then check terrain, buildings and weather.

Event date and type:
Prediction URL and version/access date:
Source time standard (UT/UTC/other):
Location and time-zone name:
UTC offset on event date (including daylight-saving rules):
Ephemeris/source for local visibility:

CONTACT | SOURCE DATE/TIME | LOCAL DATE/TIME | MOON ALTITUDE/DIRECTION
P1 (penumbral entry):
U1 (partial umbral start):
U2 (totality start, if total):
Greatest eclipse:
U3 (totality end, if total):
U4 (partial umbral end):
P4 (penumbral exit):

Use only contacts that exist for the chosen eclipse type.
Totality duration = U3 minus U2; umbral interval = U4 minus U1.
Full penumbral interval = P4 minus P1. Use unrounded times for durations.
Moonrise/moonset, twilight and horizon obstructions:
Weather, observing equipment and intended phases:

OBSERVATIONS (repeat as needed)
Actual time and standard:
Phase/color/visibility:
Cloud or haze:
Camera exposure, aperture, sensitivity and processing, if used:

HISTORICAL EXAMPLE, NOT A FUTURE-EVENT SCHEDULE
2010 Dec 21 U1: 06:32:37 UT, rounded 06:33.
EST (UTC-5): Dec 21 01:33; PST (UTC-8): Dec 20 22:33.
U2 rounded 07:41 UT -> PST Dec 20 23:41.
U3 rounded 08:53 UT -> PST Dec 21 00:53.
UT/UTC differences do not affect this minute-rounded exercise; preserve the
source time standard in precision work. Local visibility requires its own check.