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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10449343374312 1.9029e-08  
a 2.588317927006527 1.0652e-08 au
q 2.317855699194741 5.1163e-08 au
i 12.44219000329073 5.0589e-07 deg
node 259.0801140035588 2.6992e-06 deg
peri 255.9419799900249 8.994e-06 deg
M 258.8424776894802 1.0429e-05 deg
tp 2459627.886244340579
(2022-Feb-17.38624434)
4.5345e-05 TDB
period 1520.984741899003
4.16
9.3891e-06
2.571e-08
d
yr
n .2366887649053779 1.4611e-09 deg/d
Q 2.858780154818313 1.1765e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2448  
   data-arc span      12139 days (33.23 yr)  
   first obs. used      1987-12-15  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39304  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:13  

Additional Information
 Earth MOID = 1.36549 au 
 Jupiter MOID = 2.30462 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 12.95   n/a E2021B10  
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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