Planet Nine Archives

The coverage of the Pan-STARRS1 data used in this search, from 2009 April 2 until 2017 November, shown in a Mollweide projection in equatorial coordinates (RA 0 deg is at the center of the plot, with RA increasing to the left). The colors encode, with a linear scale, the number of exposures that cover the region, assuming a circular field of view with a 1.6 deg angular radius, ignoring the ∼ 68% fill factor. The ten Medium Deep fields are shown for completeness. (Note that we skip any data from the Medium Deep fields, as well as from a few exposures for which the processing seems to have failed.) Each has thousands of exposures; we cap the maximum at 600 to keep those fields from dominating the color scale. The median number of exposures is ∼150. A fraction of the sky was not observed at all, and a few regions were observed more than ∼ 400 times. The center of the plot is 0 hr and 0. -- astro-ph.EP

A Pan-STARRS Search For Distant Planets: Part 1

by Keith CowingJune 7, 2025June 7, 2025

We present a search for distant planets in Pan-STARRS1. We calibrated our search by injecting an isotropic control population of synthetic detections into Pan-STARRS1 source catalogs, providing a high-fidelity alternative […]

Planet Nine

A Pan-STARRS Search For Distant Planets: Part 1

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