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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3073798259974233 3.6841e-08  
a 2.698062139843763 8.0061e-09 au
q 1.868732268768352 1.0096e-07 au
i 8.906527025542902 4.3562e-06 deg
node 344.2500823111633 2.4441e-05 deg
peri 11.23060454552148 2.5111e-05 deg
M 2.834960149001784 6.4818e-06 deg
tp 2459187.752623701885
(2020-Dec-04.25262370)
2.9117e-05 TDB
period 1618.737204802446
4.43
7.205e-06
1.973e-08
d
yr
n .2223955802905853 9.8989e-10 deg/d
Q 3.527392010919174 1.0467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1085  
   data-arc span      9100 days (24.91 yr)  
   first obs. used      1996-03-12  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:42  

Additional Information
 Earth MOID = .863124 au 
 Jupiter MOID = 1.92767 au 
 T_jup = 3.282 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457436.5 (2016-Feb-18.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3084156119700397 3.672e-08  
q 1.86542057837725 1.0065e-07 au
tp 2457571.074796584033
(2016-Jul-01.57479658)
2.6463e-05 TDB
node 344.3272303276347 2.4448e-05 deg
peri 11.46554095910806 2.5117e-05 deg
i 8.907655488811107 4.3566e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1085  
   data-arc span      9100 days (24.91 yr)  
   first obs. used      1996-03-12  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:42  

Additional Information
 Jupiter MOID = 1.92767 au 
 T_jup = 3.282 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.34837865271601E-15 -3.690607785302076E-15 -1.671958023420058E-13 9.865433967235495E-16 -1.425014115892392E-14 -1.373707673937946E-15
q -3.690607785302076E-15 1.012946591398911E-14 4.850049387719794E-13 -2.004413207833113E-15 4.288383949685453E-14 4.034461309747203E-15
tp -1.671958023420058E-13 4.850049387719794E-13 7.003044431007805E-10 -2.625150958876716E-12 1.65975759384221E-10 1.615038839002635E-14
node 9.865433967235495E-16 -2.004413207833113E-15 -2.625150958876716E-12 5.977181966536005E-10 -5.905056808961975E-10 4.656485121703609E-12
peri -1.425014115892392E-14 4.288383949685453E-14 1.65975759384221E-10 -5.905056808961975E-10 6.308686194846674E-10 -4.573924094839565E-12
i -1.373707673937946E-15 4.034461309747203E-15 1.615038839002635E-14 4.656485121703609E-12 -4.573924094839565E-12 1.898029273383265E-11

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

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