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JPL Small-Body Database Browser
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59522 (1999 JR21)
Classification: Main-belt Asteroid          SPK-ID: 2059522
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396192538381245 3.7168e-08  
a 2.390539548195715 9.0349e-09 au
q 2.056774200206102 8.9441e-08 au
i 5.581208722578389 4.4377e-06 deg
node 258.4978038394109 3.9323e-05 deg
peri 68.95594915651196 4.2195e-05 deg
M 160.2159781410679 1.5058e-05 deg
tp 2458399.678242966628
(2018-Oct-08.17824297)
5.6332e-05 TDB
period 1350.026601850963
3.70
7.6535e-06
2.095e-08
d
yr
n .2666614120835987 1.5117e-09 deg/d
Q 2.724304896185327 1.0296e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1627  
   data-arc span      16569 days (45.36 yr)  
   first obs. used      1974-09-22  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49349  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:49:01  

Additional Information
 Earth MOID = 1.05299 au 
 Jupiter MOID = 2.59152 au 
 T_jup = 3.513 
[ 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 14.1   n/a MPO452976  
diameter diameter 3.700 km 0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.246   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59522 (1999 JR21)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JR21 = 1974 SA4 = 1989 UJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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