You can now buy the recently released book, Fall of a Thousand Suns: How Near Misses and Comet Impacts affected the Religious Beliefs of our Ancestors. It is available through iBooks and Amazon.


This website only lists information on modern-day comets and meteor showers. The book, however, thoroughly investigates how specific ancient impacts and near misses changed religious beliefs around the world.

Comet Neujmin 2

Comet Neujmin 2



The Discovery of Comet Neujmin 2 (25D / Neujmin 2)

On February 24, 1916, George van Biesbroeck (Yerkes Observatory) spotted a comet with a magnitude of 11. It became known as Comet Nuejmin 2 (25P / Nuejmin 2). It was a Jupiter-Family comet with an orbit of 5.43 years.


The comet was not observed during its return in 1921. Due to an being perturbed by Jupiter, B. F. Bawtree predicted that the next perihelion of Comet 25P / Nuejmin 2 would be on January 2, 1927. He later revised the perihelion to January 24. The comet, or a comet, was spotted, but if it was Comet Nuejmin 2 (25P / Nuejmin 2) it has not been seen since.


Due to its disappearance, the comet has been reclassified as 25D / Nuejmin, meaning it is a "lost" comet.








How Long does Comet Neujmin take to orbit the Sun?

As mentioned above, Comet Neujmin 2 is thought to take 5.43 years to orbit the Sun (JPL, 2014).


However, due to being perturbed by Earth in 1916, 1927 and 1943, as well as Jupiter in 1950, the comet's orbital period may have increased from 5.43 to 5.61 years (Kinoshita).






Comet Neujmin 2's Next Perihelion

Although it is presently considered a "lost" comet, the next calculated perihelon of 25D / Nuejmin will be on August 17, 2019.


Its last perihelion was on March 13, 2014.




Size of Comet Neujmin 2 (25D / Neujmin 2)

The size of Comet Neujmin 2 is unknown.