The comet 21P/Giacobini-Zinner

Finder chart
Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom. Click to enlarge.

From Ashburn , 21P/Giacobini-Zinner is not readily observable since it lies so far south that it will never rise more than 13° above the horizon.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.
Name 21P/Giacobini-Zinner
Object Type Comet
Current Position
Magnitude:11.38 (V)[1]
Right Ascension:07h18m [1]
Declination:-37°08' [1]
Orbital Elements[1]
Semi-major axis:3.50 AU
Longitude ascending node:195.39°
Argument of perihelion:172.86°
Epoch of elements:21 November 2018
Mean Anomaly at epoch:10.81°
Derived quantities
Perihelion:1.01 AU
Aphelion:5.98 AU
Orbital period:6.54 years
Printable finder charts
Light-on-dark PNG image PDF document
Dark-on-light PNG image PDF document
Additional sources

Magnitudes estimates are derived from observations sent into the BAA Comet Section, as compiled by Jonathan Shanklin and last updated on 31 October 2018. 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.




Color scheme