The comet C/2017 O1 (ASASSN)
From Ashburn (click to change), C/2017 O1 (ASASSN) is very well placed – it is close enough to the north celestial pole that it is high above the horizon all night.
Name C/2017 O1 (ASASSN)
Object Type Comet
|Brightness (V):||Mag 10.2|
|Semi-major axis:||420.63 AU|
|Longitude ascending node:||25.81°|
|Argument of perihelion:||20.91°|
|Epoch of elements:||14 October 2017|
|Mean Anomaly at epoch:||360.00°|
|Orbital period:||8626.69 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 2 November 2017. 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.