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JPL Small-Body Database Browser
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20489 (1999 OJ2)
Classification: Main-belt Asteroid          SPK-ID: 2020489
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1038394233314972 4.1632e-08  
a 2.589757959921958 1.3161e-08 au
q 2.320838986795507 1.0524e-07 au
i 12.44261080922823 4.3206e-06 deg
node 259.0818921275871 2.0064e-05 deg
peri 256.2451071059038 2.8532e-05 deg
M 116.5151570634283 2.1201e-05 deg
tp 2458107.817523304022
(2017-Dec-20.31752330)
8.9222e-05 TDB
period 1522.254237824167
4.17
1.1604e-05
3.177e-08
d
yr
n .2364913764435077 1.8027e-09 deg/d
Q 2.858676933048408 1.4527e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      11679 days (31.98 yr)  
   first obs. used      1987-12-15  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .419  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:44:29  

Additional Information
 Earth MOID = 1.36907 au 
 Jupiter MOID = 2.30648 au 
 T_jup = 3.380 
[ 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 12.9   n/a MPO452460  
diameter diameter 6.944 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

20489 (1999 OJ2)          Discovered 1999-Jul-22 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 OJ2 = 1987 XM = 1998 MP26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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