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100955 (1998 QJ9)
Classification: Main-belt Asteroid          SPK-ID: 2100955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2276612377355354 4.6651e-08  
a 2.301136800236064 8.1657e-09 au
q 1.777257148095532 1.0753e-07 au
i 5.094529681328259 3.8106e-06 deg
node 257.60551656 6.4257e-05 deg
peri 121.1111511831029 6.5257e-05 deg
M 104.6781311911112 1.1476e-05 deg
tp 2458829.763331119077
(2019-Dec-12.26333112)
4.0424e-05 TDB
period 1275.005574502133
3.49
6.7866e-06
1.858e-08
d
yr
n .2823517066900462 1.5029e-09 deg/d
Q 2.825016452376595 1.0025e-08 au
  Orbit Determination Parameters
   # obs. used (total)      723  
   data-arc span      8246 days (22.58 yr)  
   first obs. used      1998-08-17  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:31  

Additional Information
 Earth MOID = .784943 au 
 Jupiter MOID = 2.66226 au 
 T_jup = 3.551 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457599.5 (2016-Jul-30.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2288961255749946 4.6922e-08  
q 1.773876776365726 1.083e-07 au
tp 2457553.753377637445
(2016-Jun-14.25337764)
3.9662e-05 TDB
node 257.67014454824 6.4381e-05 deg
peri 120.7840988793637 6.5342e-05 deg
i 5.089754752051859 3.8075e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      723  
   data-arc span      8246 days (22.58 yr)  
   first obs. used      1998-08-17  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:31  

Additional Information
 Jupiter MOID = 2.66226 au 
 T_jup = 3.551 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.201665192520474E-15 -5.073342683721116E-15 -1.01645815019941E-12 1.74602244951565E-14 -2.651520546586019E-13 -5.734562257459124E-15
q -5.073342683721116E-15 1.172983528462731E-14 2.326365739363643E-12 -3.834759229234223E-14 6.031971698404621E-13 1.333343294499898E-14
tp -1.01645815019941E-12 2.326365739363643E-12 1.57306780513907E-9 -8.018622626381494E-12 4.752932284852739E-10 5.761330683880023E-12
node 1.74602244951565E-14 -3.834759229234223E-14 -8.018622626381494E-12 4.14487163668014E-9 -4.13137175478693E-9 4.089983898354146E-11
peri -2.651520546586019E-13 6.031971698404621E-13 4.752932284852739E-10 -4.13137175478693E-9 4.269519130018796E-9 -3.919959316841243E-11
i -5.734562257459124E-15 1.333343294499898E-14 5.761330683880023E-12 4.089983898354146E-11 -3.919959316841243E-11 1.449740911110405E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.86   n/a E2021B55  

100955 (1998 QJ9)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 QJ9 = 2002 VV56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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