Comet C/2021 A1 (Leonard) imaged on November 4th, 2021, since my previous image its look has changed dramatically: in just two weeks its brightness has increased from magnitude 11.5 to 10, its coma has increased in angular size from 4' to 9' having developed an strong outer halo of intense green color, and its tail has grown from 5' to 16' in length. Everything continues signaling that the comet is very active and it keeps the expectation of being observable at naked eye in December.
Daten zum Bild
|Zeitpunkt||04.11.2021 11:49 UT|
|Teleskop/Objektiv||Planewave 17" CDK f/4.5|
|Belichtungszeit||12 min. (L = 3 x 180 bin1 + RGB = 1 x 60 bin2)|