The comet 124P/Mrkos
From Cambridge , 124P/Mrkos is visible all night. It will become visible around 18:39 (EST) as the dusk sky fades, 28° above your north-eastern horizon. It will then reach its highest point in the sky at 00:29, 87° above your southern horizon. It will be lost to dawn twilight around 05:16, 38° above your north-western horizon.
Object Type Comet
|Magnitude:||15.23 (V) |
|Absolute mag (H):||14.10 |
|Slope parameter (n):||2.60 |
|Right ascension:||11h14m |
6.77 lightmin 
|Semi-major axis:||3.32 AU|
|Longitude ascending node:||0.37°|
|Argument of perihelion:||183.85°|
|Epoch of elements:||27 February 2020|
|Mean Anomaly at epoch:||350.23°|
|Orbital period:||6.04 years|
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.