The comet C/2017 O1 (ASASSN)
From Ashburn (click to change), C/2017 O1 (ASASSN) will become visible at around 20:54 (EDT) as the dusk sky fades, 66° above your north-western horizon. It will then sink towards the horizon, becoming tricky to observe after 02:59 when it dips 24° above your north-western horizon.
Name C/2017 O1 (ASASSN)
Object Type Comet
|Brightness (V mag):||14.18|
|Semi-major axis:||404.50 AU|
|Longitude ascending node:||25.81°|
|Argument of perihelion:||20.90°|
|Epoch of elements:||19 April 2018|
|Mean Anomaly at epoch:||0.02°|
|Orbital period:||8135.26 years|
|Light-on-dark||PNG image||PDF document|
|Dark-on-light||PNG image||PDF document|
Magnitudes estimates are derived from observations sent into the BAA Comet Section, as compiled by Jonathan Shanklin and last updated on 1 March 2018. We use these amateur observations in preference to the MPC's magnitude estimates, since they are updated much more often. Nonetheless, all comets are intrinsically unpredictable objects, and future magnitude estimates must always be taken with a pinch of salt.