54509 YORP

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54509 YORP
54509 YORP image radar and 3D model.gif
Radar image and 3D model of YORP
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date3 August 2000
Designations
(54509) YORP
Named after
YORP effect
2000 PH5
Apollo Minor Planets - Apollo.svg
NEO
Orbital characteristics [2] [3]
Epoch 20 March 2003 (JD 2452718.5)
Uncertainty parameter 0
Observation arc 1826 days (5.00 yr)
Aphelion 1.22998  AU (184.002  Gm)
Perihelion 0.77013 AU (115.210 Gm)
1.00005 AU (149.605 Gm)
Eccentricity 0.22991
1.00 yr (365.29 d)
Average orbital speed
29.31 km/s
314.13265°
0° 59m 7.901s / day
Inclination 1.83313°
281.88673°
274.101°
Earth  MOID 0.00268922 AU (402,302 km)
Jupiter  MOID 3.72701 AU (557.553 Gm)
TJupiter 6.056
Physical characteristics
Dimensions 150×128×93 m [4]
0.2029  h (12.17  min)
0.2029  h
12.174  min [3]
173° [4]
−85° [4]
180° [4]
0.10?
Temperature ~278 K
22.7

    54509 YORP (provisional designation 2000 PH5) is an Earth co-orbital asteroid [5] discovered on 3 August 2000 by the Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team at Lincoln Laboratory Experimental Test Site in Socorro, New Mexico. Measurements of the rotation rate of this object provided the first observational evidence of the YORP effect, hence the name of the asteroid. The asteroid's rate of rotation is increasing at the rate of (2.0 ± 0.2) × 10−4 deg/day2 which between 2001 and 2005 caused the asteroid to rotate about 250° further than its spin rate in 2001 would have predicted. [4] Simulations of the asteroid suggest that it may reach a rotation period of ~20 seconds near the end of its expected lifetime, which has a 75% probability of happening within the next 35 million years. [6] The simulations also ruled out the possibility that close encounters with the Earth have been the cause of the increased spin rate. [6]

    Contents

    On 2 January 2104, asteroid YORP will pass within 0.00530 AU (793,000 km; 493,000 mi) from Earth (about twice the distance to the Moon). [7]

    YORP is the largest member of a candidate asteroid family, another member of which is 2017 FZ2 , that would have been formed through shedding of fragments of YORP or the breakup of a larger progenitor due to the YORP effect. [8]

    Animation of 54509 YORP orbit from 1600 to 2500
    Animation of 54509 YORP orbit.gif
    Relative to Sun and Earth
    Animation of 54509 YORP orbit around Earth.gif
    Around Earth
    Animation of 54509 YORP orbit around Sun.gif
    Around Sun
       Sun ·   Earth ·  54509 YORP

    See also

    References

    1. Discovery Circumstances: Numbered Minor Planets
    2. "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
    3. 1 2 "54509 YORP". JPL Small-Body Database . Jet Propulsion Laboratory. SPK-ID:  54509 . Retrieved 12 April 2016.
    4. 1 2 3 4 5 Taylor, Patrick A.; et al. (13 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. doi:10.1126/science.1139038. PMID   17347415. S2CID   29191700.
    5. Brasser, R; Innanen, K. A; Connors, M; Veillet, C; Wiegert, P; Mikkola, Seppo; Chodas, P. W (1 September 2004). "Transient co-orbital asteroids" . Icarus. 171 (1): 102–109. Bibcode:2004Icar..171..102B. doi:10.1016/j.icarus.2004.04.019. ISSN   0019-1035.
    6. 1 2 Lowry, Stephen C.; et al. (13 April 2007). "Direct Detection of the Asteroidal YORP Effect" (PDF). Science . 316 (5822): 272–274. Bibcode:2007Sci...316..272L. doi:10.1126/science.1139040. PMID   17347414. S2CID   26687221. Archived from the original (PDF) on 24 July 2011.
    7. Matic, Otto. "JPL Close-Approach Data: 54509 YORP (2000 PH5)" (last observation: 2005-08-03; arc: 5 yr). Retrieved 18 August 2024.
    8. de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (21 January 2018). "Asteroid 2017 FZ2 et al.: signs of recent mass-shedding from YORP?". Monthly Notices of the Royal Astronomical Society . 473 (3): 3434–3453. arXiv: 1709.09379 . Bibcode:2018MNRAS.473.3434D. doi: 10.1093/mnras/stx2540 .

    Further reading