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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3073798223136225 3.6895e-08  
a 2.698062144117441 8.0159e-09 au
q 1.868732281667511 1.0112e-07 au
i 8.906527142614328 4.3674e-06 deg
node 344.2500811155225 2.4638e-05 deg
peri 11.23060533750416 2.5318e-05 deg
M 2.83495998165531 6.5227e-06 deg
tp 2459187.752624424070
(2020-Dec-04.25262442)
2.9301e-05 TDB
period 1618.737208648518
4.43
7.2138e-06
1.975e-08
d
yr
n .2223955797621799 9.911e-10 deg/d
Q 3.527392006567371 1.048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1068  
   data-arc span      9079 days (24.86 yr)  
   first obs. used      1996-03-12  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50169  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:26:45  

Additional Information
 Earth MOID = .863124 au 
 Jupiter MOID = 1.92767 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 15.07   n/a E2021B55  
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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