Observing Geometry for the 2017 Apparition
The plots presented here are for general planning purposes. If you need
more detailed values for the different geometric conditions, use the JPL
Horizons routines to compute the values for your specific situation.
Heliocentric and Geocentric Distances
Solar Elongation and Solar Phase Angle
Orbit Plane Angle
Rise, set and visibility from different latitudes
The comet rises and sets at different times depending on the observer's
latitude and longitude. The plots below provide information for
approximating when the comet will be visible, and how long it will be
observable from a given location on a given date.
Plots are given for latitude intervals of 5°, which is usually close
enough for general planning purposes. Rise and set times are given in UTC
for 0° longitude. For other latitudes, these times will be approximate
to the local time, which should again be sufficient for basic planning
purposes. Note, however, that there will be an offset (typically < 1/2
hr) for different longitudes, so more accuracy is needed, then you should
obtain a more detailed ephemeris.
How to read these plots
Comet visibility (TimeUp) and Rise/Set plots