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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 193 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6528175906388991 3.5176e-08  
a 2.122702325068281 9.6708e-09 au
q .7369649075736167 7.4564e-08 au
i 34.85185016771305 1.0927e-05 deg
node 275.5565335648528 5.9983e-06 deg
peri 284.7780846521562 8.3984e-06 deg
M 323.9543550964788 4.1026e-06 deg
tp 2459313.605147263236
(2021-Apr-09.10514726)
1.3337e-05 TDB
period 1129.619212633018
3.09
7.7196e-06
2.114e-08
d
yr
n .318691463436497 2.1779e-09 deg/d
Q 3.508439742562945 1.5984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      920  
   data-arc span      11547 days (31.61 yr)  
   first obs. used      1989-10-29  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-11 05:50:39  

Additional Information
 Earth MOID = .018879 au 
 Jupiter MOID = 2.7061 au 
 T_jup = 3.245 
[ 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 15.89   n/a MPCxxxxx  
rotation period rot_per 2.732 h n/a LCDB (Rev. 2020-October); 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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