Predict
Constants
DEG2RAD = PI / 180.0
J2000 = 2451545.0
Julian date of the J2000 epoch (January 1 2000 12:00 GMT)
JULIAN_CENTURY_DAYS = 36525.0
Length of a Julian century in days
MINS_PER_DAY = 1440.0
Time constants
PI = Math::PI
Mathematical constants
REDUCED_JD_EPOCH = Time.new(1858, 11, 16, 12, 0, 0, kind: Time::Kind::Utc)
REDUCED_JD_OFFSET = 2400000
SECONDS_PER_DAY = 86400.0
TWO_PI = PI * 2
TWO_THIRDS = 2.0 / 3.0
VERSION = "0.1.2"
XPDOTP = MINS_PER_DAY / TWO_PI
WTF constants
Class methods
greenwich_sidereal_time(julian_date : Float64)
Convert julian_date to greenwich sidereal time in radians.