The comet C/2017 S3 (PANSTARRS)
From Ashburn , C/2017 S3 (PANSTARRS) will become visible around 21:48 (EDT) as the dusk sky fades, 41° above your north-western horizon. It will then sink towards the horizon, becoming tricky to observe after 00:09 when it dips 21° above your north-western horizon.
Name C/2017 S3 (PANSTARRS)
Object Type Comet
|Right Ascension:||11h43m |
47.08 lightmin 
|Absolute Mag (V):||44.75|
Where possible, the brightnesses of comets are estimated from absolute magnitude values computed by the BAA Comet Section, based on the observations they receive. We prefer these to the Minor Planet Center's own magnitude estimates, since the latter are less often updated. Nonetheless, comets are intrinsically unpredictable objects, and magnitude estimates must always be taken with a pinch of salt.