[4] They reported the comet as a 9th-magnitude object with a short tail located within the constellation Aries.

[1] Robert G. Aitken was the last astronomer to observe Comet Borrelly–Brooks as it faded to a 15th-magnitude object within the constellation Ursa Minor on 23 December 1900.

[5] Charles D. Perrine and others calculated the first parabolic trajectory of the comet, concluding that it reached perihelion on 3 August 1900.

[7] J. M. Poor found that the comet had accelerated during its inbound flight to the Sun in 1900,[8] with Brian G. Marsden and Ichiro Hasegawa later calculating this original trajectory had an orbital period of 66,000 years before it was ejected from the Solar System.

[4] Due to the comet's very small minimum orbit intersection distance with Earth, around 0.015 AU (2.2 million km) away, it is theorized that this comet is a potential parent body of a meteor shower that should appear 21 August of each year from a radiant in the direction of the constellation Hydrus.