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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400190792506014 3.2643e-08  
a 3.213771455433189 1.8136e-08 au
q 2.763782135321569 1.111e-07 au
i 1.787481899777117 4.3015e-06 deg
node 168.6038950294722 9.5038e-05 deg
peri 292.3432238678676 9.6104e-05 deg
M 252.7394367539455 1.5845e-05 deg
tp 2459827.486922978211
(2022-Sep-04.98692298)
9.4501e-05 TDB
period 2104.364227086593
5.76
1.7813e-05
4.877e-08
d
yr
n .1710730468453199 1.4481e-09 deg/d
Q 3.663760775544809 2.0676e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1699  
   data-arc span      10747 days (29.42 yr)  
   first obs. used      1991-08-05  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48308  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:20:19  

Additional Information
 Earth MOID = 1.78112 au 
 Jupiter MOID = 1.49339 au 
 T_jup = 3.175 
[ 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 13.46   n/a E2021B10  
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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