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215653 (2003 UM121)
Classification: Main-belt Asteroid          SPK-ID: 2215653
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1651470916422255 4.5239e-08  
a 2.307904230410922 1.7602e-08 au
q 1.92676055896977 1.0427e-07 au
i 5.623643976337958 8.7491e-06 deg
node 15.82338558306135 5.0965e-05 deg
peri 276.7853271048105 6.3637e-05 deg
M 229.5022998509769 4.2873e-05 deg
tp 2459064.721722618140
(2020-Aug-03.22172262)
0.00015333 TDB
period 1280.634217704116
3.51
1.465e-05
4.011e-08
d
yr
n .2811107145375184 3.2159e-09 deg/d
Q 2.689047901852075 2.0508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      236  
   data-arc span      8709 days (23.84 yr)  
   first obs. used      1995-04-06  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50893  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 17:56:19  

Additional Information
 Earth MOID = .920101 au 
 Jupiter MOID = 2.50988 au 
 T_jup = 3.562 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.1   n/a MPO433411  
diameter diameter 1.569 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.125   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

215653 (2003 UM121)          Discovered 2003-Oct-19 by Spacewatch at Kitt Peak
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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