**Summary:** determination of best-fit rotational lightcurves for inactive or nearly inactive comet nuclei using phase dispersion minimization from sparse photometry

**Procedure:** identify all known comets for which a minimum number of observations exist where extendedness parameters indicate [mostly] stellar appearances and/or a minimum heliocentric distance criterion is satisfied; retrieve calibrated photometry for a given filter; compute equivalent absolute magnitudes for each apparent magnitude measurement (i.e., for R=Δ=1 AU and phase angle = 0, using best-fit H,G parameter values where available); perform PDM analysis on resulting data

**Observation metadata requirements:**

- filter

**L1 and L2 product requirements:**

- photometry

**Observation geometry requirements:**

- R
- Delta
- phase angle

**L3 outputs:**

- extendedness parameters