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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2004283566397093 2.9724e-08  
a 2.244329096663841 7.0465e-09 au
q 1.794501904060824 6.6971e-08 au
i 2.481644295811205 3.342e-06 deg
node 275.9562497768651 0.00010756 deg
peri 11.97074148089277 0.00010832 deg
M 48.96567183584408 1.4896e-05 deg
tp 2458833.461164519792
(2019-Dec-15.96116452)		 5.046e-05 TDB
period 1228.084462406079
3.36		 5.7837e-06
1.583e-08		 d
yr
n .2931394468542363 1.3806e-09 deg/d
Q 2.694156289266858 8.4589e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1312  
   data-arc span      9897 days (27.10 yr)  
   first obs. used      1993-10-12  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50815  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:13:48  

Additional Information
 Earth MOID = .778221 au 
 Jupiter MOID = 2.47342 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 15.3   n/a MPO337430  
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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