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52685 (1998 EZ9)
Classification: Main-belt Asteroid          SPK-ID: 2052685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593303949010327 4.3863e-08  
a 3.171212708411643 2.2031e-08 au
q 2.665942135265242 1.4022e-07 au
i 10.284289345437 5.1555e-06 deg
node 12.37177237655445 2.3718e-05 deg
peri 216.5226307840817 2.7934e-05 deg
M 12.87414112854986 1.486e-05 deg
tp 2459322.734676468198
(2021-Apr-18.23467647)
8.4995e-05 TDB
period 2062.701985809286
5.65
2.1495e-05
5.885e-08
d
yr
n .1745283625442172 1.8187e-09 deg/d
Q 3.676483281558043 2.5541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      819  
   data-arc span      8532 days (23.36 yr)  
   first obs. used      1998-02-27  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49912  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:14:16  

Additional Information
 Earth MOID = 1.66575 au 
 Jupiter MOID = 1.36135 au 
 T_jup = 3.157 
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Orbital Elements at Epoch 2457417.5 (2016-Jan-30.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1596688434930097 4.3888e-08  
q 2.665405322158568 1.4034e-07 au
tp 2457254.873894487038
(2015-Aug-20.37389449)
8.3157e-05 TDB
node 12.40724419913948 2.3714e-05 deg
peri 215.9479243653798 2.7905e-05 deg
i 10.28525979116091 5.1556e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      819  
   data-arc span      8532 days (23.36 yr)  
   first obs. used      1998-02-27  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49912  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:14:16  

Additional Information
 Jupiter MOID = 1.36135 au 
 T_jup = 3.157 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.926151441704917E-15 -6.105392144669364E-15 -9.024977768970075E-13 -1.424302728415864E-15 -9.683088085861939E-14 9.274914668377153E-16
q -6.105392144669364E-15 1.969463786956116E-14 2.772641501299869E-12 1.426118174023635E-14 2.831689620776322E-13 -4.184946257385618E-15
tp -9.024977768970075E-13 2.772641501299869E-12 6.915021954189139E-9 -7.697598421653417E-12 1.241799788517736E-9 5.213630303551264E-12
node -1.424302728415864E-15 1.426118174023635E-14 -7.697598421653417E-12 5.623752434011138E-10 -5.537979524324812E-10 -1.113226350415357E-11
peri -9.683088085861939E-14 2.831689620776322E-13 1.241799788517736E-9 -5.537979524324812E-10 7.786816912961564E-10 1.187427166632684E-11
i 9.274914668377153E-16 -4.184946257385618E-15 5.213630303551264E-12 -1.113226350415357E-11 1.187427166632684E-11 2.658004155277607E-11

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 14.46   n/a MPO636796  
diameter diameter 8.737 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.021   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52685 (1998 EZ9)          Discovered 1998-Mar-11 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 EZ9 = 2000 SN202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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