pyacs.lib.astrotime.dayno2mjd.dayno2mjd

pyacs.lib.astrotime.dayno2mjd.dayno2mjd(dayno, year, ut=0.5)[source]

Convert day of year and year to modified Julian day (JD - 2400000.5).

Parameters:

  • dayno (int or array-like) – Day of year.

  • year (int or array-like) – Year.

  • ut (float, optional) – Day fraction. Default 0.5 (middle of day).

Returns:

Modified Julian day.

Return type:

float or ndarray

Notes

When ut is not provided, the middle of the day is used.

Examples

>>> import pyacs
>>> pyacs.dayno2mjd(60,2000)
>>> 51603.5
>>> pyacs.dayno2mjd(60.,2000,ut=0)
>>> 51603.0