get_ephemeris_dataframe 'step_size' will not go down to 30 minutes

[christinahedges]

In 'get_ephemeris_dataframe' returns a dataframe of RAs, Decs and magnitudes for an object. The number of entries is specified by 'step_size' in days. The step_size keyword fails if the value is less than around 0.04 days.

Try:
df=K2ephem.get_ephemeris_dataframe('Xanthomalitia',12,12,step_size=0.02)

It would be great to return the RA and Dec every 30 minutes so I can compare with the cadences of the TPFs.

Alternately, it would be extra nice if get_ephemeris_dataframe would return RAs, Decs and magnitudes at specified times if passed an array of cadences.