Sidereal Time Calculator For Any Date, Time and Longitude
PHP Program by Jay Tanner
Local Date
± Y M D (Neg=BC)
Local Time
HH MM SS (00 to 24h)
Local Time Zone Offset
HH MM (Neg/Pos = W/E)
ΔT (Delta T)
2459807.5  0.000000000000   +0.208333333333   +0.000000000000 
Calendar Mode:    Julian             Gregorian
Longitude:  ±D M S (Neg=W)
Optional NASA Polynomial ΔT estimate = +73 sec = +00h 01m 13s
This program uses a cookie to store and remember the above interface settings between calls.
Jay Tanner - PHP Science Labs - 2022 - 1.5