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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2005304431702189 3.5554e-08  
a 2.244374238066776 8.1884e-09 au
q 1.794308877467423 8.1812e-08 au
i 2.481496060755958 3.7468e-06 deg
node 275.9608416616566 0.00011649 deg
peri 12.0837353143182 0.00011719 deg
M 291.633821530134 1.4805e-05 deg
tp 2458833.727707300090
(2019-Dec-16.22770730)
5.0993e-05 TDB
period 1228.121514281223
3.36
6.7211e-06
1.84e-08
d
yr
n .2931306029686284 1.6042e-09 deg/d
Q 2.694439598666129 9.8305e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1073  
   data-arc span      9342 days (25.58 yr)  
   first obs. used      1993-10-12  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5231  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:52:22  

Additional Information
 Earth MOID = .777392 au 
 Jupiter MOID = 2.47231 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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