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Topics referred to by the same term
Yorp or YORP may refer to one of the following: 54509 YORP, an Earth co-orbital asteroid Yarkovsky–O'Keefe–Radzievskii–Paddack effect, a second-order variation
YORP
Earth co-orbital asteroid
54509 YORP (provisional designation 2000 PH5) is an Earth co-orbital asteroid discovered on 3 August 2000 by the Lincoln Laboratory Near-Earth Asteroid
54509_YORP
Asteroid rotation perturbation
The Yarkovsky–O'Keefe–Radzievskii–Paddack effect, or YORP effect for short, changes the rotation state of a small astronomical body – that is, the body's
YORP_effect
Celestial bodies that share the orbit of Mars
are hypothesized to be fragments of Eureka that were detached after the YORP effect accelerated Eureka's rotational period to the present 2.69 hours.
Mars_trojan
Stony near-Earth asteroid
meantime. The analysis of its rotation provided observational evidence of the YORP effect. It is named after the Greek god Apollo, god of prophecy, music, healing
1862_Apollo
Pressure exerted upon any surface exposed to electromagnetic radiation
"What is the YORP effect?". Catalina Sky Survey. Retrieved 2026-04-17. Vokrouhlicky, David; Bottke, William F. (2012-05-02). "Yarkovsky and YORP effects"
Radiation_pressure
1990 episodic side-scrolling platform game
enemies can also be stunned if they are jumped on, such as the one-eyed Yorps, which block Keen's path but do not harm him. Keen can find food items throughout
Commander Keen in Invasion of the Vorticons
Commander_Keen_in_Invasion_of_the_Vorticons
Type of co-orbital motion of a small orbiting body relative to a larger orbiting body
'horns'. Asteroids in horseshoe orbits with respect to Earth include 54509 YORP, 2002 AA29, 2010 SO16, 2015 SO2 and possibly 2001 GO2. A broader definition
Horseshoe_orbit
caused by the torque from asymmetrically emitted radiation known as the YORP effect. Note that the rotation periods given below are apparent periods and
List of tumblers (small Solar System bodies)
List_of_tumblers_(small_Solar_System_bodies)
Small Solar System body that is composed of two bodies
gradual rotational acceleration by the Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) effect. High-mass ratio and doubly-synchronous binary systems such as 69230
Contact binary (small Solar System body)
Contact_binary_(small_Solar_System_body)
Australian actor (1959–2025)
Newlyweds Uri TV series, 2 episodes 1994 Halfway Across the Galaxy and Turn Left Yorp TV series, 9 episodes 1995 Correlli Stephen Haines TV miniseries. episode:
David_Argue
Group of near-Earth asteroids
(89958) 2002 LY45 2002 LINEAR List (179806) 2002 TD66 2002 LINEAR List 54509 YORP 2000 LINEAR List 162173 Ryugu 1999 LINEAR List (137108) 1999 AN10 1999 LINEAR
Apollo_asteroid
American geophysicist (born 1947)
Rubincam coined the term Yarkovsky–O'Keefe–Radzievskii–Paddack effect (YORP effect) to describe how sunlight can alter the spin rates and orientations
David_Rubincam
System of two asteroids orbiting their common center of mass
of the YORP effect. Numerical simulations suggest that when solar energy spins a “rubble pile” asteroid to a sufficiently fast rate by the YORP effect
Binary_asteroid
Asteroid with which Earth shares its orbit around the Sun
210–470 Lincoln Lab's ETS 1998-10-18 Horseshoe orbit Horseshoe orbit 54509 YORP 0.230 124 Lincoln Lab's ETS 2000-08-03 Horseshoe orbit Horseshoe orbit 2001
Earth_trojan
Annual meteor shower
pieces and releasing material by normal cometary activity, mass loss via YORP spin-up, or occasionally by close encounters with the tidal force of Earth
Taurids
Carbonaceous Apollo asteroid
of the source of asteroid (101955) Bennu: Applications of the stochastic YORP model", Icarus, 247: 191–217, Bibcode:2015Icar..247..191B, doi:10.1016/j
101955_Bennu
Configuration of two or more astronomical objects
near-Earth objects (NEOs) have since been discovered. These include 54509 YORP, (85770) 1998 UP1, 2002 AA29, (419624) 2010 SO16, 2009 BD, and 2015 SO2 which
Co-orbital_configuration
Disintegrated active main-belt asteroid
sunlight reflecting off its irregular surface, a phenomenon known as the YORP effect. The asteroid likely reached a rotation period shorter than 2 hours
P/2013 R3 (Catalina–PanSTARRS)
P/2013_R3_(Catalina–PanSTARRS)
Curved path of an object around a point
1093/mnras/stab031. Bottke, Jr., William F.; et al. (2006). "The Yarkovsky and YORP Effects: Implications for Asteroid Dynamics" (PDF). Annual Review of Earth
Orbit
Pair of main-belt asteroids
Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) effect. For asteroids with diameters under 1 km (0.62 mi), the YORP effect can double their rotation rates
(458271) 2010 UM26 and (796785) 2010 RN221
(458271)_2010_UM26_and_(796785)_2010_RN221
Near-Earth asteroid
rotation period of 8.76 hours, which is likely gradually slowing because of the YORP effect. 1996 HW1 was discovered on 23 April 1996 by astronomer Tom Gehrels
(8567)_1996_HW1
Near-Earth asteroid of the Atira group
thermal fracturing or rotational fissioning due to either outgassing or the YORP effect. 2025 GN1 was discovered on 4 April 2025, by the 4.0-meter (13.1 ft)
2025_GN1
Background asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1450_Raimonda
Belgian-born astronomer and professor
influence of sunlight on the orbits and spins of asteroids, the Yarkovsky and YORP effects. In 2007, Margot and collaborators determined that Mercury has a
Jean-Luc_Margot
Claims that Earth may have other natural satellites
210–470 Lincoln Lab's ETS 1998-10-18 Horseshoe orbit Horseshoe orbit 54509 YORP 0.230 124 Lincoln Lab's ETS 2000-08-03 Horseshoe orbit Horseshoe orbit 2001
Claimed_moons_of_Earth
Trojan asteroid of Mars
fragments of 5261 Eureka that were detached after it was spun up by the YORP effect (consistent with its rotational period of 2.69 h). The infrared spectrum
5261_Eureka
Moon of asteroid 152830 Dinkinesh
asteroid's surface, which is called the Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) effect, is responsible for rotationally accelerating asteroids to the point
Selam_(moon)
Hypothetical asteroids orbiting close to the Sun
System; would-be vulcanoid asteroids were found to be steadily spun up by the YORP effect until they rotationally fission into smaller bodies, which occurs
Vulcanoid
Force on a rotating celestial body due to asymmetric thermal radiation
the next 100 years. Asteroid Poynting–Robertson effect Radiation pressure YORP effect Beekman, George (2005). "The nearly forgotten scientist John Osipovich
Yarkovsky_effect
Near-Earth asteroid
10 seconds, which could be attributed to the tangential component of the YORP effect accelerating their rotation far beyond this period. The asteroid exhibits
2020_HS7
Asteroid
is possible that the extremely long period of this asteroid is caused by YORP radiation pressure slowing down the asteroid's rotation. This is especially
(162058)_1997_AE12
Aten asteroid co-orbital with Earth
near-Earth objects (NEOs) have since been discovered. These include 54509 YORP, (85770) 1998 UP1, 2002 AA29, and 2009 BD which exist in resonant orbits
3753_Cruithne
Bodies orbiting within the main asteroid belt which have shown cometary activity
Bhatt, Bhuwan C. (2019-04-01). "The Sporadic Activity of (6478) Gault: A YORP-driven Event?" (PDF). The Astrophysical Journal. 874 (2): L20. arXiv:1903
Active_asteroid
Apollo asteroid
when the asteroid passed 0.11509 AU (17.217 Gm) from Earth. The observed YORP value is (1.4±0.6)×10−8 rad d−2. 3103 Eger is the only asteroid besides 4
3103_Eger
Relative directions of orbit or rotation
belt and near-Earth population and most are thought to be formed by the YORP effect causing an asteroid to spin so fast that it breaks up. As of 2012
Retrograde and prograde motion
Retrograde_and_prograde_motion
Provisional This minor planet was named for... Ref · Catalog 54509 YORP 2000 PH5 YORP effect JPL · 54509 54510 Yakagehonjin 2000 PD7 Yakage honjin, located
Meanings of minor-planet names: 54001–55000
Meanings_of_minor-planet_names:_54001–55000
work has laid the foundation for a rigorous understanding of the Binary YORP effect and the determination of material parameters of binary asteroids based
Meanings of minor-planet names: 46001–47000
Meanings_of_minor-planet_names:_46001–47000
Natural satellite of a minor planet
natural satellite Yarkovsky–O'Keefe–Radzievskii–Paddack effect, also known as YORP effect – Asteroid rotation perturbationPages displaying short descriptions
Minor-planet_moon
April 2007). "Spin Rate of Asteroid (54509) 2000 PH5 Increasing Due to the YORP Effect" (PDF). Science. 316 (5822): 274–277. Bibcode:2007Sci...316..274T
List of Solar System objects by size
List_of_Solar_System_objects_by_size
Electromagnetic radiation generated by the thermal motion of particles
rotation of the asteroid carries the warm surface out of the Sun's view (the YORP effect). Nanostructures with spectrally selective thermal emittance properties
Thermal_radiation
Near-Earth asteroid of the Apollo and Alinda group
angular momentum and entered into this tumbling motion as a result of the YORP effect. With a semimajor axis of 2.5294 AU, or roughly 2.5 times the distance
4179_Toutatis
Active main belt asteroid
enough that it lies near the threshold where the YORP effect can significantly modify its spin. If YORP spinup is not responsible for its current rotation
(62412)_2000_SY178
Sub-kilometer asteroid classified as a near-Earth object of the Aten group
launch in 2026. However, in April 2023, the new target is 2019 VL5. 54509 YORP (419624) 2010 SO16 3753 Cruithne 2015 SO2 2015 XX169 2015 YQ1 2015 YA ^ This
2020_PN1
Yorii 5744 Yorimasa 3902 Yoritomo 28220 York 35976 Yorktown 5784 Yoron 54509 YORP 10547 Yosakoi 10405 Yoshiaki 34077 Yoshiakifuse 3950 Yoshida 7351 Yoshidamichi
List of named minor planets: Y
List_of_named_minor_planets:_Y
Topics referred to by the same term
absorption and emission result in asteroids orbits spiraling in to the Sun YORP effect – effects of variations between radiation absorption and emission
Temperature_lag
Process that leads to gradual decrease of the distance between two orbiting bodies
S2CID 219176648. Bottke, Jr., William F.; et al. (2006). "The Yarkovsky and YORP Effects: Implications for Asteroid Dynamics" (PDF). Annu. Rev. Earth Planet
Orbital_decay
Near-Earth asteroid of the Atira group
period of 3.49 hours. Due to the asteroid's close proximity to the Sun, the YORP effect can double its rotation rate in 150±50 thousand years. At perihelion
2021_PH27
Polish-Russian civil engineer (1844–1902)
System (e.g., asteroids) was developed into the Yarkovsky effect and the YORP effect. The asteroid 35334 Yarkovsky is named in his honour †. In 1888, he
Ivan_Yarkovsky
(53426) 1999 SL5 (53429) 1999 TF5 (53550) 2000 BF19 (53789) 2000 ED104 † 54509 YORP (55408) 2001 TC2 (55532) 2001 WG2 (65679) 1989 UQ (65690) 1991 DG (65717)
List of Earth-crossing asteroids
List_of_Earth-crossing_asteroids
Active asteroid and periodic comet
known as P/2010 A2 (LINEAR) Yarkovsky–O'Keefe–Radzievskii–Paddack effect (YORP effect) "She calculated that dust-ejection events occurred on April 15, July
311P/PanSTARRS
1934), an aeronautical engineer and contributor to the understanding of the Yorp effect JPL · 5191 5192 Yabuki 1991 CC Hiroshi Yabuki (born 1960), a leading
Meanings of minor-planet names: 5001–6000
Meanings_of_minor-planet_names:_5001–6000
Stony asteroid from the inner regions of the asteroid belt
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1559_Kustaanheimo
Type of satellite in sync with another orbit
210–470 Lincoln Lab's ETS 1998-10-18 Horseshoe orbit Horseshoe orbit 54509 YORP 0.230 124 Lincoln Lab's ETS 2000-08-03 Horseshoe orbit Horseshoe orbit 2001
Quasi-satellite
Periodic comet
and rotating rapidly, with a rotation period of only 3.2 hours. Due to the YORP effect, P/2012 F5 had begun to spin so quickly that, being a likely rubble
331P/Gibbs
Asteroid
causing a decrease in the orbital semimajor axis of 27.4±5.7 m yr−1, while the YORP effect is increasing the asteroid's rotation at the rate of (1.14±0.03)×10−3 rad
1620_Geographos
Asteroid in the asteroid belt
binary is thought to be the result of fission of the precursor caused by YORP-driven spinup. Observations of the HST revealed ongoing activity in this
(300163)_2006_VW139
Moon of asteroid Didymos
Didymos's retrograde rotation. Dimorphos's rotation is being slowed down by the YORP effect, with an estimated rotation period doubling time of 86,000 years.
Dimorphos
Near-Earth micro-asteroid and quasi-satellite
FZ2, the largest being 54509 YORP. There is an apparent excess of small bodies moving in orbits similar to that of YORP and this could be the result of
2017_FZ2
Near-Earth asteroid
an assumed albedo range of 0.20–0.04 respectively). 3753 Cruithne 54509 YORP (419624) 2010 SO16 469219 Kamoʻoalewa 2015 SO2 2015 XX169 2015 YQ1 2015 YA
2020_PP1
of the Morphological Catalogue of Galaxies Ivan Yarkovsky, discovered the YORP and Yarkovsky effects of meteoroids or asteroids Aleksandr Zaitsev, coined
List_of_Russian_scientists
Main-belt asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1518_Rovaniemi
Stony near-Earth asteroid
asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect". Astronomy and Astrophysics. 547: 9. arXiv:1210.2219. Bibcode:2012A&A
1865_Cerberus
Asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1241_Dysona
Asteroid
oblique relative to its orbital plane, contrary to predictions from the YORP effect. A lightcurve study made by the Harvard University, shows that 2021
2021_DW1
Family of asteroids in the inner asteroid belt
caused by slow drift of the semi-major axis caused by the Yarkovsky and YORP effects. Details of the lobes were used to calculate the age of the family
Massalia_family
Asteroid in the asteroid belt
current paradigm is that slowing of an asteroid's spin rate is the result of YORP radiation pressure, which acts on the target as the inverse square of its
912_Maritima
Near-Earth asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
4954_Eric
Asteroid
Eduardo (January 2020). "Population control of Mars Trojans by the Yarkovsky & YORP effects". Icarus. 335 (1): 113370 (34 pages). arXiv:1907.12858. Bibcode:2020Icar
2011_SP189
Near-Earth asteroid
characteristics. Other members of this group include 10563 Izhdubar, 54509 YORP, (66063) 1998 RO1, (85770) 1998 UP1, and (85990) 1999 JV6. Before 1996, the
2003_YN107
Main-belt asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1255_Schilowa
1985 novel by Robin Klein
Diane Cilento as Principa/Authoritax Sandy Gore as Aunt Hecla David Argue as Yorp Spencer McLaren as Law Enforcer Alex Menglet as Mr Hohenhaus Marion Edward
Halfway Across the Galaxy and Turn Left
Halfway_Across_the_Galaxy_and_Turn_Left
Potentially hazardous near-Earth asteroid in the Apollo group
observations of asteroids (1862) Apollo and (25143) Itokawa – an analysis of YORP effect". Astronomy and Astrophysics. 488 (1): 345–350. Bibcode:2008A&A..
25143_Itokawa
Ukrainian astronomer
specialist in asteroids, notable for obtaining light curves and co-discovering YORP acceleration of many asteroids. He works at the Department of asteroids and
Yurij_N._Krugly
Very elongated asteroid from the background population
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
1111_Reinmuthia
Near-Earth asteroid with 2 moons
material spun away from the main body as its rotation accelerated due to the YORP effect. The inner moon's period orbiting Florence appears to be approximately
3122_Florence
Micro-asteroid classified as near-Earth object of the Apollo group and Aten group
Earth of the horseshoe type and follows an orbit similar to those of 54509 YORP, 2017 FZ2 and several other near-Earth asteroids. 2017 DR109 has an absolute
2017_DR109
of the Morphological Catalogue of Galaxies Ivan Yarkovsky, discovered the YORP and Yarkovsky effect of meteoroids and asteroids Aleksandr Zaitsev, coined
List_of_Russian_people
Object captured by a planet for a while
210–470 Lincoln Lab's ETS 1998-10-18 Horseshoe orbit Horseshoe orbit 54509 YORP 0.230 124 Lincoln Lab's ETS 2000-08-03 Horseshoe orbit Horseshoe orbit 2001
Temporary_satellite
Main-belt Massalian asteroid
ISBN 9780816532131. D. Vokrouhlický; et al. (2006). "Yarkovsky/YORP chronology of asteroid families". Icarus. 182 (1): 118–142. Bibcode:2006Icar
20_Massalia
Aten asteroid in a horseshoe orbit co-orbital with Earth
04–0.20, respectively). Animation of 2015 SO2 orbit from 1600 to 2500 54509 YORP (419624) 2010 SO16 3753 Cruithne ^ This is assuming an albedo of 0.20–0.04
2015_SO2
Philippine government agency
organizations in the country. The agency's Youth Organization Registration Program (YORP) was launched to register, help, and facilitate the establishment of youth
National Youth Commission (Philippines)
National_Youth_Commission_(Philippines)
American planetary scientist
extensively on the importance of tidal disruption and the Yarkovsky and YORP effects on the physical structure and orbits of asteroids, and the early
William_F._Bottke
Building in Copenhagen, Denmark
Hvitfeltsgade was listed as No. 162, owned by fish-soaker (fiskebløder) Børge Olsen Yorp. In 1691, it was sold to quartermaster in HDMS Svenske Falk asmus Knudsen
Lille_Købmagerhus
Active main belt asteroid
opposition. The asteroid began to break up as its spin accelerated due to the YORP effect, and its rotation speed approached two hours – near the limit of stability
6478_Gault
Small near-Earth asteroid
include 3753 Cruithne (the first to be discovered), (85770) 1998 UP1, 54509 YORP, 2001 GO2, 2002 AA29, 2003 YN107, 164207 Cardea, and (706765) 2010 TK7 (an
2009_BD
Near-Earth asteroid
shedding. Currently the most generally accepted spin-up mechanism is the YORP effect. The asteroid is characterized as both a carbonaceous C-type and metallic
(185851)_2000_DP107
American astronomer (1916–2000)
idea of a scanning microscope in 1956 and he is the co-discoverer of the YORP effect (short for Yarkovsky-O’Keefe-Radzievskii-Paddock effect), an effect
John_A._O'Keefe_(astronomer)
Golubov (born 1985) has changed our understanding of the YORP effect via his theory of Tangential YORP, which helps explain the measured spin evolution of
Meanings of minor-planet names: 17001–18000
Meanings_of_minor-planet_names:_17001–18000
John A. O'Keefe (astronomer) - Astronomer who is the co-discoverer of the YORP effect. NASA's Goddard Space Flight Center conferred its highest honor, the
List_of_Irish_Americans
Elongated Eos asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
807_Ceraskia
Near-Earth asteroid
moons; it is one of the largest solitary top-shaped asteroids known. The YORP effect can spin up an NEA towards the spin barrier, at which point a cohesionless
(23187)_2000_PN9
Italian astronomer
astronomy and astrophysics at the University of Pisa with a thesis on the YORP effect, and moved for his doctorate to the University of Hawaii where he
Marco_Micheli
Asteroid
which he later named the Yarkovsky–O'Keefe–Radzievskii–Paddack effect or YORP effect for short. The official naming citation was published by the Minor
9921_Rubincam
Astronomical observatory in Ukraine
introduction of H-G1-G2 asteroid magnitude system and to the discovery of the YORP effect for several asteroids. In 2022 the observational station was occupied
Chuhuiv_Observational_Station
Main-belt asteroid
families. It is thought that this pair was created due to rotational fission (YORP effect) some 16340±40 years ago. The other body of this pair, 2001 NQ8, has
6070_Rheinland
MPC 219. 2008 XC1 724 0.201 – 2 NEO S 0.05 23.70 LCDB · MPC 220. 54509 YORP 730 0.2029 0.89 3 NEO S 0.09 22.70 LCDB · List 221. 2012 TC4 735 0.204155
List of fast rotators (minor planets)
List_of_fast_rotators_(minor_planets)
Elongated background asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
900_Rosalinde
Main-belt asteroid
physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics
994_Otthild
Asteroid
became gravitationally unbound due to rotational fission induced by the YORP-effect or from a collisional breakup of the parent body. After the discovery
3749_Balam
YORP
YORP
YORP
YORP
Boy/Male
Bengali, Hindu, Indian, Tamil
Name of the Chola King; Soldier
Surname or Lastname
English
English : variant of Jefferson.
Girl/Female
Indian
Goddess Durga
Surname or Lastname
English
English : of uncertain origin, perhaps a variant of northern English Aculf, from an Old Norse personal name Agúlfr ‘terror wolf’.Probably also of German origin : an Americanized form of Eckhoff or Eickhoff.The name first appears in North America in VA and PA in the early 1700s and later became concentrated in the Appalachian regions of NC and TN. The earliest records of Acuff occur with the personal names Timothy and David, indicating (in PA at least) Episcopal Church membership, thereby implying English origin, although no records of the name have been found in England.
Surname or Lastname
English
English : habitational name from any of various places so called. Most, including those in Berkshire, Cambridgeshire, and West Yorkshire, are named from Old English wulf ‘wolf’ or perhaps the personal name or byname Wulf (see Wolf) + lēah ‘wood’, ‘clearing’. One example in Somerset, however, has as its first element Middle English wolle, wulle ‘spring’, ‘stream’ (see Wool 2).
Girl/Female
Muslim/Islamic
Shining star
Boy/Male
Tamil
Holy message of marathi saint
Girl/Female
Native American
Pheasant.
Girl/Female
Hindu, Indian, Marathi
Goddess Lakshmi
Girl/Female
Tamil
Deekshitha | தீகà¯à®·à®¿à®¤à®¾
Initiation
YORP
YORP
YORP
YORP
YORP