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213001 (1981 EP3)
Classification: Main-belt Asteroid          SPK-ID: 2213001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1626233027518632 5.4004e-08  
a 3.148339321855906 3.0818e-08 au
q 2.636345983152137 1.6117e-07 au
i 9.033197465147767 5.3142e-06 deg
node 228.7289739875792 3.1998e-05 deg
peri 302.0599705931583 3.7907e-05 deg
M 94.12981887197668 1.5643e-05 deg
tp 2458862.986455444440
(2020-Jan-14.48645544)
9.0265e-05 TDB
period 2040.425428856115
5.59
2.996e-05
8.203e-08
d
yr
n .1764337941043109 2.5906e-09 deg/d
Q 3.660332660559674 3.583e-08 au
  Orbit Determination Parameters
   # obs. used (total)      264  
   data-arc span      14374 days (39.35 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:29:39  

Additional Information
 Earth MOID = 1.65587 au 
 Jupiter MOID = 1.42698 au 
 T_jup = 3.169 
[ 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 15.94   n/a E2021B55  
diameter diameter 5.316 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.025   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213001 (1981 EP3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

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