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120447 (1981 EP32)
Classification: Main-belt Asteroid          SPK-ID: 2120447
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2363258058518777 4.9516e-08  
a 2.360245523762199 1.3216e-08 au
q 1.802458598350811 1.1512e-07 au
i 9.816429058307373 7.1741e-06 deg
node 344.4823623416733 2.4319e-05 deg
peri 291.0339442157924 3.0612e-05 deg
M 221.8507070279813 2.1596e-05 deg
tp 2459508.753486753347
(2021-Oct-21.25348675)
8.1355e-05 TDB
period 1324.445831715293
3.63
1.1124e-05
3.046e-08
d
yr
n .2718117958314408 2.2829e-09 deg/d
Q 2.918032449173588 1.6339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      14168 days (38.79 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46973  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:06  

Additional Information
 Earth MOID = .814323 au 
 Jupiter MOID = 2.31376 au 
 T_jup = 3.494 
[ 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 MPO401062  
diameter diameter 2.066 km 0.253 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.344   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120447 (1981 EP32)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

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Alternate Designations
 1981 EP32 = 2000 RL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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