(501647) 2014 SD224

(501647) 2014 SD224 is an Aten near-Earth asteroid around 150 meters (490 feet) in diameter. It was discovered on 22 September 2014 when the asteroid was 0.29 AU (43 million km; 110 LD) from Earth and had a solar elongation of 123 degrees. The glare of the Sun had masked the approach of the asteroid as it passed closest approach to Earth on 11 August 2014.[2][lower-alpha 1] The asteroid now has a 5 year observation arc and a well determined orbit. It also makes close approaches to Venus.

(501647) 2014 SD224
Discovery[1]
Discovered byPan-STARRS
Discovery date22 September 2014
Designations
(501647) 2014 SD224
Orbital characteristics[2]
Epoch 2020-May-31 (JD 2459000.5)
Uncertainty parameter 1
Observation arc5.3 years
Aphelion1.3015 AU (Q)
Perihelion0.65406 (q)
0.97779 AU (a)
Eccentricity0.33107 (e)
353.15 days (0.97 years)
75.398° (M)
Inclination4.5484° (i)
286.44° (Ω)
277.11° (ω)
Earth MOID0.017 AU (2.5 million km)
Venus MOID0.024 AU (3.6 million km)
Jupiter MOID3.66 AU (548 million km)
Physical characteristics
Dimensions92–210 meters (CNEOS)
~150 m (490 ft)
22.3[2]

    2020

    2014 SD224 will be less than 90 degrees from the Sun until September 2020 when it will have an apparent magnitude of 24. The asteroid will come to opposition (opposite the Sun in the sky) on 12 December 2020 when it will have a solar elongation of 149 degrees and a magnitude of 18.[3] It will reach peak brightness on 23 December 2020 at magnitude 16.4, which is still fainter than Pluto.

    The asteroid will safely pass closest approach to Earth on 25 December 2020 at 20:20 UT at a distance of 0.02 AU (3.0 million km; 7.8 LD).[2] The 2020 close approach distance is known with an accuracy of roughly ± 132 km.

    Notes
    1. The asteroid was within 60 degrees of the Sun from February 2014 until 9 August 2014 04:11 UT.

    References
    1. "MPEC 2014-S92 : 2014 SD224". IAU Minor Planet Center. 2014-09-25. Retrieved 2020-06-10. (K14SM4D)
    2. "JPL Small-Body Database Browser: 501647 (2014 SD224)". Jet Propulsion Laboratory. Archived from the original on 2020-06-08. Retrieved 2020-06-10.
    3. "(501647) 2014SD224 Ephemerides for December 2020". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2020-06-10.
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