def isorbit_record(self):
        """`True` if `targetname` appears to be a comet orbit record number.

        NAIF record numbers are 6 digits, begin with a '9' and can
        change at any time.

        """

        import re
        test = re.match('^9[0-9]{5}$', self.targetname.strip()) is not None
        return test
`True` if `targetname` appears to be a comet orbit record number.

        NAIF record numbers are 6 digits, begin with a '9' and can
        change at any time.