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71657 (2000 EP122)
Classification: Main-belt Asteroid          SPK-ID: 2071657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05576624174690948 4.0505e-08  
a 2.264271641931098 1.0454e-08 au
q 2.138001722166497 9.0505e-08 au
i 5.642232573344634 3.719e-06 deg
node 244.9828331771396 4.4306e-05 deg
peri 316.4016312734289 5.6388e-05 deg
M 299.3347209476298 3.5761e-05 deg
tp 2459210.214720944916
(2020-Dec-26.71472094)
0.00012385 TDB
period 1244.489446343689
3.41
8.6189e-06
2.36e-08
d
yr
n .2892752534444388 2.0034e-09 deg/d
Q 2.3905415616957 1.1037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      839  
   data-arc span      8281 days (22.67 yr)  
   first obs. used      1997-05-31  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4879  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:29:24  

Additional Information
 Earth MOID = 1.13711 au 
 Jupiter MOID = 2.58542 au 
 T_jup = 3.609 
[ 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 15.6   n/a MPO449453  
diameter diameter 1.825 km 0.259 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.254   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71657 (2000 EP122)          Discovered 2000-Mar-11 by LONEOS at Anderson Mesa
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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