(415029) 2011 UL21

(415029) 2011 UL21
Discovery[1]
Discovered byCatalina Sky Srvy.
Discovery siteCatalina Stn.
Discovery date17 October 2011
Designations
(415029) 2011 UL21
2011 UL21
Apollo · NEO · PHA[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc9379 days (25.68 yr)
Aphelion3.5091 AU (524.95 Gm)
Perihelion0.73606 AU (110.113 Gm)
2.1226 AU (317.54 Gm)
Eccentricity0.65323
3.09 yr (1129.5 d)
110.19°
0° 19m 7.392s / day
Inclination34.845°
275.60°
284.74°
Known satellites1 moonlet discovered
Earth MOID0.0185982 AU (2.78225 Gm)
Physical characteristics
2.5 km[3]
Mass2.1×1013 kg (assumed)[3]
15.8[2]

(415029) 2011 UL21, provisional designation 2011 UL21, is an Apollo class potentially hazardous asteroid discovered on October 17, 2011, by the Catalina Sky Survey project.[1] The asteroid is estimated to have a diameter of 2.5 kilometres (1.6 mi). It was rated at Torino Scale 1 on October 27, 2011, with an observation arc of 9.6 days.[4]

  1. ^ a b Cite error: The named reference MPEC2011-U39 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference jpl was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference jplneo was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference hohmanntransfer1027 was invoked but never defined (see the help page).