I found this nice formula and website for converting Gregorian calander date to UT1
http://aa.usno.navy.mil/faq/docs/JD_Formula.php
This appears to be the way Orbiter does it as my own test coversions are consistent with orbiter
I was wondering though if there is a formula for converting gregorian calander date to UTC NOT UT (aka UT1)?
Apparently DUT1 is the difference btween UTC and UT1 and there is some info here
http://tf.nist.gov/pubs/bulletin/leapsecond.htm
that indicates might be somewhat unpredictable in terms of having an outright formula but iam not sure.
Stellarium uses UTC and Orbiter seems to use UT1
when i compare the julian days for matching gregorian dates between orbiter and stellarium the numbers are different. I would like to know how to get them to match using some rule or formula if possible.
thanks for any help.
http://aa.usno.navy.mil/faq/docs/JD_Formula.php
This appears to be the way Orbiter does it as my own test coversions are consistent with orbiter
I was wondering though if there is a formula for converting gregorian calander date to UTC NOT UT (aka UT1)?
Apparently DUT1 is the difference btween UTC and UT1 and there is some info here
http://tf.nist.gov/pubs/bulletin/leapsecond.htm
that indicates might be somewhat unpredictable in terms of having an outright formula but iam not sure.
Stellarium uses UTC and Orbiter seems to use UT1
when i compare the julian days for matching gregorian dates between orbiter and stellarium the numbers are different. I would like to know how to get them to match using some rule or formula if possible.
thanks for any help.
