The comet 217P/LINEAR
From Ashburn (click to change), 217P/LINEAR is visible in the morning sky, becoming accessible at around 00:22, when it rises 24° above your eastern horizon. It will then reach its highest point in the sky at 04:45, 61° above your southern horizon. It will be lost to dawn twilight at around 05:45, 58° above your south-western horizon.
Object Type Comet
|Brightness (V):||Mag 13.6|
|Semi-major axis:||3.96 AU|
|Longitude ascending node:||125.45°|
|Argument of perihelion:||246.95°|
|Epoch of elements:||14 October 2017|
|Mean Anomaly at epoch:||11.20°|
|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 August 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.