The comet 103P/Hartley
From Ashburn (click to change), 103P/Hartley is not observable – it will reach its highest point in the sky during daytime and is no higher than 23° above the horizon at dusk.
Object Type Comet
|Right Ascension:||11h13m |
|Semi-major axis:||3.48 AU|
|Longitude ascending node:||219.72°|
|Argument of perihelion:||181.32°|
|Epoch of elements:||14 June 2018|
|Mean Anomaly at epoch:||63.92°|
|Orbital period:||6.48 years|
The MPC's magnitude estimates are updated rather rarely, and so we prefer to estimate the brightness of comets on the basis of amateur observations. No amateur observations of are available, however, and consequently the magnitude estimates shown here may be unreliable.