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91381 (1999 JR109)
Classification: Main-belt Asteroid          SPK-ID: 2091381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2418385187817154 1.0773e-07  
a 2.559640344827061 1.5063e-08 au
q 1.940620715220165 2.8235e-07 au
i 14.33923328062406 6.3872e-06 deg
node 64.82751735643933 1.5726e-05 deg
peri 349.8791362791642 1.9534e-05 deg
M 223.2404820157315 8.4687e-06 deg
tp 2459568.727054849386
(2021-Dec-20.22705485)
3.7798e-05 TDB
period 1495.77698693929
4.10
1.3204e-05
3.615e-08
d
yr
n .2406775897365852 2.1246e-09 deg/d
Q 3.178659974433956 1.8706e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1303  
   data-arc span      7373 days (20.19 yr)  
   first obs. used      1999-05-13  
   last obs. used      2019-07-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:28:53  

Additional Information
 Earth MOID = .954237 au 
 Jupiter MOID = 2.19198 au 
 T_jup = 3.352 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457049.5 (2015-Jan-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2434075267324121 1.075e-07  
q 1.934678532574225 2.8127e-07 au
tp 2456581.371280381680
(2013-Oct-15.87128038)
3.1883e-05 TDB
node 64.83704347252019 1.5718e-05 deg
peri 350.0634597343516 1.9505e-05 deg
i 14.34965827837973 6.3931e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1303  
   data-arc span      7373 days (20.19 yr)  
   first obs. used      1999-05-13  
   last obs. used      2019-07-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:28:53  

Additional Information
 Jupiter MOID = 2.19198 au 
 T_jup = 3.352 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.155560619604891E-14 -3.021798989518589E-14 -1.051198658619191E-12 6.144894431938318E-14 -8.894169801746895E-13 -6.446599695699632E-14
q -3.021798989518589E-14 7.911339788975927E-14 2.614046032394625E-12 -1.632538943695576E-13 2.302767115411097E-12 1.697340522188559E-13
tp -1.051198658619191E-12 2.614046032394625E-12 1.016510532966115E-9 -1.771766508659024E-12 3.349118568155722E-10 1.977472360346774E-12
node 6.144894431938318E-14 -1.632538943695576E-13 -1.771766508659024E-12 2.470619639227634E-10 -2.419490614391591E-10 -4.1810585179387E-11
peri -8.894169801746895E-13 2.302767115411097E-12 3.349118568155722E-10 -2.419490614391591E-10 3.804580138760993E-10 4.416293221278344E-11
i -6.446599695699632E-14 1.697340522188559E-13 1.977472360346774E-12 -4.1810585179387E-11 4.416293221278344E-11 4.087198392437762E-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 13.8   n/a MPO337939  
diameter diameter 9.696 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91381 (1999 JR109)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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