School of Mathematics
University of Minnesota
Pluto's Insolation


A simple formula for a planet’s mean annual insolation by latitude

Alice Nadeau and Richard McGehee

Icarus 291 (2017) 46-50. doi: 10.1016/j.icarus.2017.01.040


Abstract.  In this paper, we use a sixth order Legendre series expansion to approximate the mean annual insolation by latitude of a planet with obliquity angle β, leading to faster computations with little loss in the accuracy of results. We discuss differences between our method and selected computational results for insolation found in the literature.

Electronic Copies

The paper is available for subscribers on the publisher's Web site:
doi: 10.1016/j.icarus.2017.01.040

Early versions are available on ArXiv:

March 18, 2018, version:
ArXiv:  arXiv:1510.04542v2
Cached Copy: Nadeau2018ArXiv_v2.pdf

October 13, 2015, version:
ArXiv: arXiv:1510.04542v1
Local copy: Nadeau2015ArXiv_v1.pdf


Last update: May 12, 2018 ©2018 Richard McGehee