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20442 (1999 JK52)
Classification: Main-belt Asteroid          SPK-ID: 2020442
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1076628937663324 4.0013e-08  
a 2.137810641726066 6.2535e-09 au
q 1.907647761713377 8.5493e-08 au
i 2.756648645645658 4.205e-06 deg
node 305.965450585753 6.1517e-05 deg
peri 354.1601753298599 6.3244e-05 deg
M 274.0644570273466 1.4888e-05 deg
tp 2459473.035200418398
(2021-Sep-15.53520042)
4.7407e-05 TDB
period 1141.700730067477
3.13
5.0095e-06
1.372e-08
d
yr
n .3153190591186913 1.3836e-09 deg/d
Q 2.367973521738754 6.9268e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1933  
   data-arc span      10543 days (28.87 yr)  
   first obs. used      1992-02-09  
   last obs. used      2020-12-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49789  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:10  

Additional Information
 Earth MOID = .89006 au 
 Jupiter MOID = 2.79256 au 
 T_jup = 3.707 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.88   n/a E2021B10  
diameter diameter 2.710 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.317   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20442 (1999 JK52)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JK52 = 1993 OC4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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