2021 PH27 is a near-Earth asteroid of the Atira group. It was discovered by Scott Sheppard using the Dark Energy Survey's DECam imager at NOIRLab's Cerro...

to produce substantial evidence on vulcanoids. On August 13, 2021, an asteroid, 2021 PH27, was discovered with a perihelion well within the orbit of Mercury...

movements of Vulcan Tyche (hypothetical planet) Vulcan (Star Trek) Vulcanoid 2021 PH27, an Atira asteroid with an intra-Mercurian perihelion, the smallest semi-major...

significant scientific events that occurred or were scheduled to occur in 2021. 1 July Construction begins on the Square Kilometre Array, with first light...

significant events in science that have occurred in the first quarter of 2021. 1 January – Beginning of the implementation of Plan S, an initiative for...

significant events in science that have occurred in the second quarter of 2021. 2 April – Scientists report that the event that caused the mass-extinction...

(2018) S/2018 J 4 (2018) S/2021 J 1 (2021) S/2021 J 2 (2021) S/2021 J 3 (2021) S/2021 J 4 (2021) S/2021 J 5 (2021) S/2021 J 6 (2021) S/2022 J 1 (2022) S/2022...

Notable discoveries from this survey include the Atira asteroids 2021 LJ4 and 2021 PH27, the latter of which holds the record for the shortest orbital period...

2019 LF6 is a near-Earth object of the Atira group. After 2021 PH27, it has the second-smallest semi-major axis among the known asteroids (0.555 AU),...

S. Sheppard MPC · JPL 2021 PB2 0.610 0.7174 0.825 0.1501 24.83 222 3392 18.8 620 Zwicky Transient Facility MPC · JPL 2021 PH27 0.133 0.4617 0.790 0.7117...