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160857 (2001 EU21)
Classification: Main-belt Asteroid          SPK-ID: 2160857
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2550925880629005 8.2949e-08  
a 2.855720356338335 3.2739e-08 au
q 2.127247259856081 2.2867e-07 au
i 5.976668562451865 7.7393e-06 deg
node 274.0484255332271 8.4362e-05 deg
peri 281.0202868596703 8.6137e-05 deg
M 254.3638911465672 2.645e-05 deg
tp 2459117.727774008575
(2020-Sep-25.22777401)
0.00013676 TDB
period 1762.673773808131
4.83
3.0312e-05
8.299e-08
d
yr
n .2042351825671324 3.5121e-09 deg/d
Q 3.584193452820589 4.109e-08 au
  Orbit Determination Parameters
   # obs. used (total)      200  
   data-arc span      8388 days (22.97 yr)  
   first obs. used      1995-11-30  
   last obs. used      2018-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6298  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:47:05  

Additional Information
 Earth MOID = 1.13629 au 
 Jupiter MOID = 1.46925 au 
 T_jup = 3.247 
[ 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 15.9   n/a MPO236955  
diameter diameter 4.377 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

160857 (2001 EU21)          Discovered 2001-Mar-15 by LONEOS at Anderson Mesa
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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