Abstract We present the Citizen Science program Active Asteroids and describe discoveries
stemming from our ongoing project. Our NASA Partner program is hosted on the Zooniverse …

Abstract The Scattered Disk Objects (SDOs) are a population of trans-Neptunian bodies with
semimajor axes 50< a≲ 1000 au and perihelion distances q≳ 30 au. The detached SDOs …

Large constellations of bright artificial satellites in low Earth orbit pose significant challenges
to ground-based astronomy. Current orbiting constellation satellites have brightnesses …

The apparent brightness of satellites is calculated as a function of satellite position as seen
by a ground-based observer in darkness. Both direct illumination of the satellite by the Sun …

Context. Increasingly, Oort Cloud comets are being discovered at great distances from the
Sun and tracked over ever wider ranges of heliocentric distances as observational …

The proper elements of asteroids are obtained from the instantaneous orbital elements by
removing periodic oscillations produced by gravitational interactions with planets. They are …

Small Solar system bodies serve as pristine records that have been minimally altered since
their formation. Their observations provide valuable information regarding the formation and …

Long-period comets are planetesimal remnants constraining the environment and volatiles
of the protoplanetary disc. We report the discovery of hyperbolic long-period comet C/2022 …

Abstract The Milky Way is thought to host a huge population of interstellar objects (ISOs),
numbering approximately 10 15 pc− 3 around the Sun, which are formed and shaped by a …

The discovery of two interstellar objects passing through the solar system, 1I/'Oumuamua
and 2I/Borisov, implies that a galactic population exists with a spatial number density of …