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442381 (2011 UA9)
Classification: Main-belt Asteroid          SPK-ID: 2442381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3322666586572574 8.3633e-08  
a 2.602150693174378 3.1998e-08 au
q 1.737542777030662 2.3495e-07 au
i 3.635061815767391 5.8171e-06 deg
node 220.4076904061615 6.9288e-05 deg
peri 121.3767842316004 7.0656e-05 deg
M 50.71821952820591 7.9694e-06 deg
tp 2458784.497593175154
(2019-Oct-27.99759318)
3.2643e-05 TDB
period 1533.193932679349
4.20
2.828e-05
7.743e-08
d
yr
n .2348039555380174 4.3309e-09 deg/d
Q 3.466758609318095 4.2629e-08 au
  Orbit Determination Parameters
   # obs. used (total)      353  
   data-arc span      5017 days (13.74 yr)  
   first obs. used      2006-04-30  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42045  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:41:10  

Additional Information
 Earth MOID = .733064 au 
 Jupiter MOID = 1.97573 au 
 T_jup = 3.331 
[ 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 17.0   n/a MPO440831  

442381 (2011 UA9)          Discovered 2006-Apr-30 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2011 UA9 = 2006 HH96 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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