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2017 YE5

2017 YE5
Radar images of binary asteroid 2017 YE5 taken by the Arecibo Observatory in June 2018
Discovery[1][2]
Discovered byClaudine Rinner
Discovery siteOukaïmeden Obs.
Discovery date21 December 2017
Designations
2017 YE5
tltv005[3][4]
Apollo · PHA · NEO[5]
Orbital characteristics[5]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 2
Observation arc0.74 yr (270 days)
Earliest precovery date12 December 2017
Aphelion4.818 AU
Perihelion0.818 AU
2.818 AU
Eccentricity0.70964
4.73 yr (1,728 days)
155.681°
0° 12m 29.952s / day
Inclination6.218°
103.927°
110.794°
Known satellites1
Earth MOID0.0209 AU
TJupiter2.877
Physical characteristics
0.90±0.05 km or 900±50 m
(for each body)[6][7]
Mean density
0.6–1.2 g/cm3[8]
14.88±0.02 h[8]
0.02–0.04[8]
D[8]
26.8[9]
19.2 (combined)[5][2]
19.3[6]

2017 YE5 is a binary pair of asteroids of approximately equal size and mass, each about 0.9 km (0.56 mi) in diameter. Classified as a near-Earth asteroid and potentially hazardous object of the Apollo group, 2017 YE5 was discovered by amateur astronomer Claudine Rinner at the Oukaïmeden Observatory on 21 December 2017. On 21 June 2018, the pair of asteroids passed within 15.5 lunar distances or approximately 6 million km (3.7 million mi) from Earth. During the close encounter, 2017 YE5 was resolved in high detail by concurrent radar observations by the Arecibo and Green Bank observatories, along with individual observations by the Goldstone Solar System Radar. 2017 YE5 is likely an extinct or dormant comet due to its distant elliptical orbit and dark red surface.[8]

  1. ^ Cite error: The named reference MPEC-2017-Y116 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference MOSS-MPC-report was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference NEO-Exchange was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference johnston was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Taylor2019 was invoked but never defined (see the help page).
  8. ^ a b c d e Cite error: The named reference Monteiro2021 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference NEODyS was invoked but never defined (see the help page).
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