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JPL Small-Body Database Browser
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415029 (2011 UL21)
Classification: Apollo [NEO, PHA]          SPK-ID: 2415029
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6528991292293352 6.6403e-08  
a 2.122468012609829 1.5464e-08 au
q .7367104953597539 1.4189e-07 au
i 34.85377162843611 1.4604e-05 deg
node 275.5540202855477 9.9095e-06 deg
peri 284.7907450182953 1.2196e-05 deg
M 260.2048834570355 8.7828e-06 deg
tp 2459313.588377833602
(2021-Apr-09.08837783)
2.9581e-05 TDB
period 1129.43217989601
3.09
1.2343e-05
3.379e-08
d
yr
n .318744238395214 3.4834e-09 deg/d
Q 3.508225529859904 2.556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      481  
   data-arc span      10514 days (28.79 yr)  
   first obs. used      1989-10-29  
   last obs. used      2018-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38926  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Sep-03 06:52:48  

Additional Information
 Earth MOID = .0198862 au 
 Jupiter MOID = 2.70705 au 
 T_jup = 3.246 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO455958  
rotation period rot_per 2.732 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2018) Minor Planet Bull. 45, 366-379.]

415029 (2011 UL21)          Discovered 2011-Oct-17 by CSS at Catalina
Reference: Last Updated: 2014-11-10

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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