Planets are used as primary flux calibrator for both IRAM observatories.
Planet brightness temperatures in ASTRO were not updated since their first implementation.
The accuracy of the planet models have
greatly improved over the past years to about 5% absolute accuracy,
rendering it important to update ASTRO.
We present in this report the comparison of the current implementation of planet brightness temperature in ASTRO to the results of more advanced models.
We describe how we implement new models in ASTRO and what could be the impact on IRAM instrument calibration.