Southern Skies Light Up as Comet C/2021 T4 Lemmon Passes By

Comet C/2021 T4 Lemmon, a long-period comet discovered in 2021 from Mount Lemmon Observatory, is currently sweeping through the southern skies. It will reach perihelion on July 31, 2023, and will be at conjunction behind and north of the sun on November 9, 2023. The comet's brightness and tail size predictions can be unreliable due to the melting of ice and release of dust in these spinning objects. Alan Hale, discoverer of the great comet Hale-Bopp, alerted us to this comet with a Facebook post on May 22.