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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627671795283103 5.4031e-08  
a 3.146940462293989 3.1144e-08 au
q 2.634721839102879 1.6141e-07 au
i 9.03569081507054 5.3157e-06 deg
node 228.7430297526655 3.1997e-05 deg
peri 301.8812034392715 3.7877e-05 deg
M 59.68469961915229 1.5684e-05 deg
tp 2458862.441602612670
(2020-Jan-13.94160261)
8.9978e-05 TDB
period 2039.065687454445
5.58
3.027e-05
8.287e-08
d
yr
n .1765514481534047 2.6209e-09 deg/d
Q 3.659159085485098 3.6213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      263  
   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      .59298  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:40:56  

Additional Information
 Earth MOID = 1.65319 au 
 Jupiter MOID = 1.42959 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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