V band photometry of asteroids from the All-Sky Automated Survey for Supernovae

The All-Sky Automated Survey for Supernovae (ASAS-SN) currently
operates 24 small-aperture telescopes distributed around the globe to
automatically survey the entire visible sky every night down to about
g~18 mag. Between 2013 and 2018, the survey used a V filter with
limiting magnitude V~17. Although primarily hunting for supernovae and
other transients, asteroids are common intruders in the ASAS-SN's
images. Here we present efforts to analyze the sparsely sampled V-band
photometry extracted from the ASAS-SN images for >10,000 asteroids
that get brighter than V~17 mag. The data span years 2013-2018 and
sample up to 7 consequent apparitions for each asteroid. We provide
details about the photometry extraction and calibration, photometry
accuracy, and various statistics such as the typical number of data
points per asteroid as a function of the brightness. Finally, we
analyze the photometric data with the lightcurve inversion method and
derive rotation periods, spin axis directions, and shapes for a sample
of studied asteroids. We discuss the typical amount of data sufficient
for a successful shape model determination. We compare derived
physical properties with those available in the literature to
illustrate the reliability of the ASAS-SN photometry.