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129450 (1991 JM)
Classification: Mars-crossing Asteroid          SPK-ID: 2129450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263841786243047 1.0272e-07  
a 1.851337026603452 6.0582e-09 au
q 1.617357317139412 1.9177e-07 au
i 24.4973395155513 7.9797e-06 deg
node 64.30892559047547 1.2524e-05 deg
peri 353.30480183342 3.6258e-05 deg
M 352.5214412048138 3.1268e-05 deg
tp 2459019.613581339879
(2020-Jun-19.11358134)
7.9946e-05 TDB
period 920.0822606068838
2.52
4.5162e-06
1.236e-08
d
yr
n .3912693629834195 1.9206e-09 deg/d
Q 2.085316736067492 6.8239e-09 au
  Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      10741 days (29.41 yr)  
   first obs. used      1991-05-05  
   last obs. used      2020-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51119  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:49:05  

Additional Information
 Earth MOID = .631428 au 
 Jupiter MOID = 3.25356 au 
 T_jup = 3.887 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457131.5 (2015-Apr-19.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263309914887833 1.0299e-07  
q 1.617446328655217 1.9229e-07 au
tp 2457178.805643157066
(2015-Jun-05.30564316)
7.7261e-05 TDB
node 64.33546210291946 1.2526e-05 deg
peri 353.0954268434639 3.6192e-05 deg
i 24.49735493645865 7.9808e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      10741 days (29.41 yr)  
   first obs. used      1991-05-05  
   last obs. used      2020-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51119  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:49:05  

Additional Information
 Jupiter MOID = 3.25356 au 
 T_jup = 3.887 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.060778790044096E-14 -1.979809827578767E-14 -6.810840888831737E-12 -1.011779253699606E-13 -3.023912383259491E-12 2.915420784157091E-15
q -1.979809827578767E-14 3.69764061447335E-14 1.269958636358417E-11 1.890912808665355E-13 5.636976096059099E-12 -5.035690804652305E-15
tp -6.810840888831737E-12 1.269958636358417E-11 5.969227124825287E-9 7.249012977598312E-11 2.645207269095557E-9 -1.284232272028131E-11
node -1.011779253699606E-13 1.890912808665355E-13 7.249012977598312E-11 1.568955081379271E-10 -1.088388809883116E-10 -6.908388423516914E-11
peri -3.023912383259491E-12 5.636976096059099E-12 2.645207269095557E-9 -1.088388809883116E-10 1.309868325084201E-9 5.683361638840922E-11
i 2.915420784157091E-15 -5.035690804652305E-15 -1.284232272028131E-11 -6.908388423516914E-11 5.683361638840922E-11 6.369320445644393E-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 16.5   n/a MPO385564  

129450 (1991 JM)          Discovered 1991-May-05 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1991 JM = 2002 VF48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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