planetoid
Language: English
Part of speech: noun
Forms: form: planetoids
Etymology: From planet + -oid.
Senses: examples: text: The group of small bodies that circle round the Sun, outside the orbit of Mars, are known under the designation of the planetoids.
ref: 1856, Robert James Mann, A guide to astromomical science, page 231:
text: Numbering of the Planetoids or Asteroidal Planets.—In numbering the planetoids a difficulty has arisen [...]
ref: 1859, J.D. & E.S. Dana, The American journal of science, page 153:
ref: 1979, Tsunami generation by pelagic planetoid impact:
text: if one can argue for the early existence of a few largely molten planetoids with dimension of kilometers or tens of kilometers, one can quite as easily argue for very large numbers of such planetoids.
ref: 1979, H.A. Zook, “On a New Model for the Generation of Chondrites”, in Lunar and Planetary Science, volume xii, page 1242:
topics: astronomy
natural-sciences
glosses: An asteroid of any size
topics: astronomy
natural-sciences
glosses: An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
examples: ref: 1991, Optimal trajectories for an ion driven spacecraft from earth to the planetoid Vesta:
text: After discovering "planetoids", bodies orbiting the Sun, even larger than Pluto's moon Charon ... the question of how Sedna and other planetoids came to be.
ref: 2009, Paul A. Czysz, Claudio Bruno, Future Spacecraft Propulsion Systems, pages 377–378:
text: Eris [...] was the upstart planetoid that knocked Pluto off the planetary lists
ref: 2009, Patricia Daniels, Robert Burnham, The New Solar System: Ice Worlds, Moons, and Planets Redefined, National Geographic Books, page 173:
topics: astronomy
natural-sciences
glosses: A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
examples: text: Plate tectonics is a style of convection for an active planetoid where lid fragment (plate) motions reflect sinking of dense lithosphere in subduction zones […] In 2015 humanity completed a 50+ year effort to survey the 30 largest planets, asteroids, satellites, and inner Kuiper Belt objects, which we informally call “planetoids”.
ref: 2018 January 24, Stern, Gerya & Tackley, “Stagnant lid tectonics: Perspectives from silicate planets, dwarf planets, large moons, and large asteroids”, in Geoscience Frontiers, volume 9, number 1, pages 103-119:
topics: astronomy
natural-sciences
glosses: Any planetary body, including classical planets and moons: a planetary-mass object
examples: text: We prefer the word "planetoid" as a new word to describe round objects orbiting the sun.
ref: 2006, Mike Brown, “Sedna”, in (Please provide the book title or journal name):
text: A dwarf planet or a planetoid is a celestial body that [...]
ref: 2007, Hannu Karttunen et al., editors, Fundamental Astronomy, 5th edition, page 131:
text: 'Dwarf planet' is a dumb phrase. For years we've called things like Pluto and Xena 'planetoids'—planetlike.
ref: 2010, Mike Brown, How I Killed Pluto and Why It Had It Coming, page 223:
topics: astronomy
natural-sciences
glosses: A dwarf planet
Derived terms: planetoidal
Related terms: dwarf planet
microplanetoid
minor planet
planemo
planetesimal