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20422 (1998 UE8)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020422
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391462970938057 3.2528e-08  
a 3.218011636088174 1.8602e-08 au
q 2.770237232921725 1.1081e-07 au
i 1.784812618191407 4.2978e-06 deg
node 168.6451078028074 9.6284e-05 deg
peri 291.8423215257446 9.7354e-05 deg
M 219.0309207646948 1.5868e-05 deg
tp 2459826.159922357656
(2022-Sep-03.65992236)
9.5303e-05 TDB
period 2108.530279555903
5.77
1.8283e-05
5.006e-08
d
yr
n .1707350392311288 1.4804e-09 deg/d
Q 3.665786039254623 2.1191e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1673  
   data-arc span      10669 days (29.21 yr)  
   first obs. used      1991-08-05  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48436  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:54  

Additional Information
 Earth MOID = 1.78776 au 
 Jupiter MOID = 1.49305 au 
 T_jup = 3.174 
[ 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 13.4   n/a MPO435889  
diameter diameter 12.824 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.056   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20422 (1998 UE8)          Discovered 1998-Oct-23 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 UE8 = 1991 PF32 = 2000 CF56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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