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Astronomy and Cosmology
Astronomy and Astrophysics
Position and Velocity in Heliocentric Ecliptic Coordinates
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[QUOTE="Jenab2, post: 5479430, member: 107288"] [B]Converting Calendar Date into Julian Date.[/B] Year = the year as a four digit integer Month = the month, an integer from 1-12 Day = the day of the month, an integer Q₁ = integer( ( Month − 14 ) / 12 ) Q₂ = integer( ( 1461 ( Year + 4800 + Q₁ ) ) / 4 ) Q₃ = integer( ( 367 ( Month − 2 − 12 Q₁ ) ) / 12 ) Q₄ = integer( ( Year + 4900 + Q₁ ) / 100 ) Q₅ = integer( ( 3 Q₄ ) / 4 ) J = Q₂ + Q₃ − Q₅ + Day − 32075.5 J : Julian Date of midnight, Greenwich Mean Time (GMT), beginning the calendar date of Day/Month/Year. Hour = hours in the GMT of the time of interest Min = minutes in the GMT of the time of interest Sec = seconds in the GMT of the time of interest t = J + Hour/24 + Min/1440 + Sec/86400 t : Julian date of the time of interest [/QUOTE]
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Astronomy and Cosmology
Astronomy and Astrophysics
Position and Velocity in Heliocentric Ecliptic Coordinates
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