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JPL Small-Body Database Browser
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71656 (2000 ET121)
Classification: Main-belt Asteroid          SPK-ID: 2071656
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05633138681725438 4.2043e-08  
a 2.983304695567854 2.0214e-08 au
q 2.81525100476809 1.2553e-07 au
i 11.08044685446994 5.0165e-06 deg
node 74.36447141323345 2.7043e-05 deg
peri 77.52760120707362 5.6954e-05 deg
M 258.0719628308191 5.022e-05 deg
tp 2459133.388078686205
(2020-Oct-10.88807869)
0.00026393 TDB
period 1882.109316091479
5.15
1.9129e-05
5.237e-08
d
yr
n .1912747558933513 1.944e-09 deg/d
Q 3.151358386367618 2.1353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1244  
   data-arc span      7398 days (20.25 yr)  
   first obs. used      1998-10-20  
   last obs. used      2019-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52224  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:38:54  

Additional Information
 Earth MOID = 1.8536 au 
 Jupiter MOID = 1.93758 au 
 T_jup = 3.228 
[ 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 13.8   n/a MPO337801  
diameter diameter 5.923 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.152   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71656 (2000 ET121)          Discovered 2000-Mar-11 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 ET121 = 1998 WX11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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