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101845 (1999 JL74)
Classification: Main-belt Asteroid          SPK-ID: 2101845
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09672956397220625 5.84e-08  
a 2.677538129089782 1.5506e-08 au
q 2.418541033343971 1.583e-07 au
i 14.59513062196071 5.0403e-06 deg
node 67.1768768319151 1.8712e-05 deg
peri 106.4289381802306 3.392e-05 deg
M 17.13081626659231 2.6049e-05 deg
tp 2459124.348672356438
(2020-Oct-01.84867236)
0.00011571 TDB
period 1600.301907688122
4.38
1.3901e-05
3.806e-08
d
yr
n .2249575522409233 1.9541e-09 deg/d
Q 2.936535224835594 1.7006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      808  
   data-arc span      7989 days (21.87 yr)  
   first obs. used      1999-05-08  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56889  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:34:03  

Additional Information
 Earth MOID = 1.46518 au 
 Jupiter MOID = 2.14241 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457419.5 (2016-Feb-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09791998637782302 5.8552e-08  
q 2.416019767145652 1.5904e-07 au
tp 2457525.591958632149
(2016-May-17.09195863)
0.00011265 TDB
node 67.22474531530149 1.8722e-05 deg
peri 106.8325746660629 3.3496e-05 deg
i 14.59110999459493 5.0385e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      808  
   data-arc span      7989 days (21.87 yr)  
   first obs. used      1999-05-08  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56889  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:34:03  

Additional Information
 Jupiter MOID = 2.14241 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.428334576157869E-15 -9.276344702714912E-15 2.213002626189012E-12 6.170313004133939E-15 6.855360732573201E-13 -1.461413546529134E-14
q -9.276344702714912E-15 2.529220060104178E-14 -5.938519866429099E-12 -1.787711952743772E-14 -1.847716329197713E-12 4.031822261214757E-14
tp 2.213002626189012E-12 -5.938519866429099E-12 1.268977032265414E-8 -3.205188785633208E-11 3.138995055746439E-9 -4.875157259946117E-13
node 6.170313004133939E-15 -1.787711952743772E-14 -3.205188785633208E-11 3.505140710423963E-10 -3.459491818927712E-10 -1.779878708296494E-11
peri 6.855360732573201E-13 -1.847716329197713E-12 3.138995055746439E-9 -3.459491818927712E-10 1.121978947110821E-9 1.638878322142228E-11
i -1.461413546529134E-14 4.031822261214757E-14 -4.875157259946117E-13 -1.779878708296494E-11 1.638878322142228E-11 2.53868252188435E-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 15.12   n/a E2021B55  

101845 (1999 JL74)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 JL74 = 2001 WS30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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