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20438 (1999 JP22)
Classification: Main-belt Asteroid          SPK-ID: 2020438
[ 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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2003356679409374 2.8327e-08  
a 2.24445554997497 6.7582e-09 au
q 1.79481104820699 6.3625e-08 au
i 2.481614620801264 3.2495e-06 deg
node 275.9580358272144 0.00010264 deg
peri 11.99082947021703 0.00010343 deg
M 107.5797450504516 1.4894e-05 deg
tp 2458833.477279384005
(2019-Dec-15.97727938)		 5.0051e-05 TDB
period 1228.188255696219
3.36		 5.5473e-06
1.519e-08		 d
yr
n .2931146738542359 1.3239e-09 deg/d
Q 2.69410005174295 8.1122e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1380  
   data-arc span      9985 days (27.34 yr)  
   first obs. used      1993-10-12  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50563  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:20:53  

Additional Information
 Earth MOID = .776594 au 
 Jupiter MOID = 2.4728 au 
 T_jup = 3.604 
[ 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 15.36   n/a E2021B10  
diameter diameter 3.522 km 1.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.098   0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

20438 (1999 JP22)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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