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20487 (1999 NJ62)
Classification: Main-belt Asteroid          SPK-ID: 2020487
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2091160980856797 4.6034e-08  
a 2.734481724451697 1.5957e-08 au
q 2.162657575947757 1.2688e-07 au
i 8.375617325398352 4.5592e-06 deg
node 231.2651095123674 3.4221e-05 deg
peri 103.0840596000881 3.6167e-05 deg
M 243.4319663835366 1.6311e-05 deg
tp 2459735.295733996234
(2022-Jun-04.79573400)
7.7504e-05 TDB
period 1651.623161733191
4.52
1.4457e-05
3.958e-08
d
yr
n .2179673961596789 1.9079e-09 deg/d
Q 3.306305872955637 1.9293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      9251 days (25.33 yr)  
   first obs. used      1995-11-16  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52908  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:12  

Additional Information
 Earth MOID = 1.17012 au 
 Jupiter MOID = 2.17538 au 
 T_jup = 3.306 
[ 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 14.4   n/a MPO333008  
diameter diameter 4.550 km 0.745 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.195   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20487 (1999 NJ62)          Discovered 1999-Jul-13 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NJ62 = 1995 WL10 = 1998 HG130 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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