The comet 217P/LINEAR
From Ashburn (click to change), 217P/LINEAR will become visible at around 20:55 (EDT) as the dusk sky fades, 60° above your south-western horizon. It will then sink towards the horizon, setting 6 hours and 34 minutes after the Sun at 02:20.
Object Type Comet
|Brightness (V mag):||17.69|
|Semi-major axis:||3.96 AU|
|Longitude ascending node:||125.45°|
|Argument of perihelion:||246.94°|
|Epoch of elements:||19 April 2018|
|Mean Anomaly at epoch:||34.64°|
|Orbital period:||7.87 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 30 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.