This was
your sky.
Comet Lemmon and the Deep Sky
Comet Lemmon, now heading for the outer solar system, still shows a greenish coma. This telescopic view captures it posing with star clusters and nebulae in Cassiopeia. The rich background is typical of this northern constellation, which lies along the crowded plane of our Milky Way galaxy. The comet is about 16 light-minutes, or 2 AU, from the Sun.
We cannot put this date's photograph on paper at poster size. We can print the nearest public archive plate to your date instead.
See print sizesFrom $29.00
In tropical astrology, 20 JUL 2013 falls under Cancer (♋). The sign's window runs from 06-21 through 07-22. Cancer is marked by the Beehive Cluster, M44, a loose family of stars visible to the naked eye on a dark night. The Sun was crossing this region of the sky on 20 JUL 2013.