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Calculators

UT to JD Calculator

Enter the UT DATE and TIME and then press the COMPUTE JD button.
YEAR
MONTH
DAY
HRS
MIN
SEC

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JD to UT Calculator

Enter the JD and then press the COMPUTE DATE button.
JD

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Equatorial to Angle Calculator

Enter the Equatorial Coordinates and then press the COMPUTE ANGLE button.
RA 1
DEC 1
Hrs
Min
Sec
Deg
Min
Sec
RA 2
DEC 2
Hrs
Min
Sec
Deg
Min
Sec
ANGLE BETWEEN OBJS 1 and 2

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Equatorial to Horizon Calculator

Enter the Equatorial Coordinates and then press the COMPUTE HORIZON COORDS button.
OBS INFO
RA
DEC
JD
LONG
LAT
Hrs
Min
Sec
Deg
Min
Sec
ALT
AZI

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Horizon to Equatorial Calculator

Enter the Horizon Coordinates and then press the COMPUTE EQUAT COORDS button.
OBS INFO
ALT
AZI
JD
LONG
LAT
Deg
Min
Sec
Deg
Min
Sec
RA
DEC

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