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In the main asteroid belt, there appear to be two primary populations of asteroid: a dark, volatile-rich population, consisting of the C-type and P-type asteroids, with albedos less than 0.10 and densities under 2.2 g/cm 3, and a dense, volatile-poor population, consisting of the S-type and M-type asteroids, with albedos over 0.15 and densities ...
(This rule was violated once for the comet-asteroid 4015 Wilson–Harrington, whose name has 17 characters; this is because it had already been named as a comet before being rediscovered as an asteroid.) [27] Letters with diacritics are accepted, although in English the diacritical marks are usually omitted in everyday usage.
The adjectival forms of the names of astronomical bodies are not always easily predictable. Attested adjectival forms of the larger bodies are listed below, along with the two small Martian moons; in some cases they are accompanied by their demonymic equivalents, which denote hypothetical inhabitants of these bodies.
A newly discovered asteroid named 2024 YR4 now has a 2.2% chance of affecting Earth in 2032 after recent observations.
Originally classified as comet C/2017 U1, it was later reclassified as asteroid A/2017 U1 due to the absence of a coma. Once it was unambiguously identified as coming from outside the Solar System, a new designation was created: I, for Interstellar object. As the first object so identified, ʻOumuamua was designated 1I, with rules for the ...
Asteroid 2024 YR4 has a 2.8% to 3.1% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.
I f you’re like every other earthling, you may want to keep your head down on Dec. 22, 2032. That’s the day an asteroid dubbed 2024 YR4 may strike our planet. Cosmic bookmakers don’t make an ...
List of asteroid close approaches to Earth in 2023; List of asteroid close approaches to Earth in 2024; J. List of Jupiter trojans (Greek camp)