## 10. `class MJD`

: Modified Julian date

This class represents a Modified Julian Date, which is
defined as the Julian date minus 2,400,000.5.

### 10.1. `MJD.__init__()`

: Constructor

To create an MJD instance, use this calling sequence:

MJD(m, f=None)

The argument `m`

may be either a `float`

or an `int`

. If you would
like to carry extra precision, you can pass the integral
part as `m`

and the fraction as `f`

. The integral and fractional parts are
carried separately inside the object, so that finding
the difference between two `MJD`

instances
gives you a full 15 digits after the decimal.