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100993 (1998 QG39)
Classification: Main-belt Asteroid          SPK-ID: 2100993
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3077329086693065 3.8504e-08  
a 2.699255876695192 9.1734e-09 au
q 1.868606014517061 1.0484e-07 au
i 8.9045115773568 4.5201e-06 deg
node 344.2599810049561 2.7821e-05 deg
peri 11.22017787671617 2.8492e-05 deg
M 318.3878673991025 8.1295e-06 deg
tp 2459187.732822042497
(2020-Dec-04.23282204)
3.7183e-05 TDB
period 1619.81162036971
4.43
8.2574e-06
2.261e-08
d
yr
n .2222480660546395 1.133e-09 deg/d
Q 3.529905738873322 1.1996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      851  
   data-arc span      8913 days (24.40 yr)  
   first obs. used      1996-03-12  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51983  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 09:05:11  

Additional Information
 Earth MOID = .864693 au 
 Jupiter MOID = 1.92435 au 
 T_jup = 3.282 
[ 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 14.9   n/a MPO474884  
diameter diameter 4.783 km 1.592 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.093   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100993 (1998 QG39)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 QG39 = 1996 EC9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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