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JPL Small-Body Database Browser
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213000 (1981 ET2)
Classification: Main-belt Asteroid          SPK-ID: 2213000
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1842040776209062 5.8508e-08  
a 3.138792772690171 3.7624e-08 au
q 2.560614345153612 1.9258e-07 au
i 8.709795387624192 6.333e-06 deg
node 249.2116614771291 4.2011e-05 deg
peri 250.4520991236997 4.5883e-05 deg
M 340.2878587202651 1.8245e-05 deg
tp 2458711.717645096820
(2019-Aug-16.21764510)
0.00010397 TDB
period 2031.151850358165
5.56
3.652e-05
9.999e-08
d
yr
n .1772393334041072 3.1868e-09 deg/d
Q 3.716971200226731 4.4554e-08 au
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      13854 days (37.93 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58571  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:39:57  

Additional Information
 Earth MOID = 1.59078 au 
 Jupiter MOID = 1.49574 au 
 T_jup = 3.167 
[ 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 15.7   n/a MPO422828  
diameter diameter 5.043 km 1.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213000 (1981 ET2)          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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