Tag Archives: 21P/Giacobini–Zinner

A Naked Eye Visible Comet, FINALLY, 21P/Giacobini–Zinner — In September 2018.

by Anura Guruge


Click to ENLARGE and read here. Wikipedia: en.wikipedia.org/wiki/21P/Giacobini–Zinner


Click to ENLARGE and admire. From the JPL Small-Body Database Browser.


It will NOT be spectacular, and it is definitely not a great comet, BUT, if it is naked eye visible, it, with its green tinge (due to its chemical composition), should be quite the sight up there. We have not see a decent comet since the mid-1980s. Comet ISON, on which I expended considerable time and energy, vaporized when it got too close to the Sun.

No such danger with 21P/Giacobini–Zinner. This is not a sungrazer.

The ‘P’ in the 21P denotes that it is a periodic comet; i.e., a comet that has made at least 2 well observed orbits around the Sun. Actually 21P orbits the Sun every 6 years. It is very periodic. It doesn’t go too far away. Just beyond the orbit of Jupiter. It is well known and well studied comet that was discovered in 1900.

I will keep you posted. I was excited to hear that it might be naked eye visible. Wow.


Related posts:
Check Category ‘astronomy’.


by Anura Guruge