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100345 (1995 ST61)
Classification: Main-belt Asteroid          SPK-ID: 2100345
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .218841423238555 4.5245e-08  
a 2.232987405058044 6.6612e-09 au
q 1.744317263261374 1.0058e-07 au
i 5.63488092944882 5.3379e-06 deg
node 163.7667876276648 3.7331e-05 deg
peri 204.083528460799 3.955e-05 deg
M 190.5722360418134 1.263e-05 deg
tp 2459774.101020814830
(2022-Jul-13.60102081)
4.4123e-05 TDB
period 1218.787066943174
3.34
5.4536e-06
1.493e-08
d
yr
n .2953756318590678 1.3217e-09 deg/d
Q 2.721657546854714 8.1189e-09 au
  Orbit Determination Parameters
   # obs. used (total)      646  
   data-arc span      9364 days (25.64 yr)  
   first obs. used      1995-07-26  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53825  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:45  

Additional Information
 Earth MOID = .743052 au 
 Jupiter MOID = 2.74094 au 
 T_jup = 3.602 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457191.5 (2015-Jun-18.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2193808670427653 4.5597e-08  
q 1.743254036236033 1.0156e-07 au
tp 2457334.744172412391
(2015-Nov-08.24417241)
3.8695e-05 TDB
node 163.8274072029201 3.7278e-05 deg
peri 203.741365148111 3.9472e-05 deg
i 5.637711864627417 5.3431e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      646  
   data-arc span      9364 days (25.64 yr)  
   first obs. used      1995-07-26  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53825  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:45  

Additional Information
 Jupiter MOID = 2.74094 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.079097149715523E-15 -4.624912819598642E-15 -9.143884684008331E-13 5.317201689622418E-15 -3.53161305685269E-13 -6.808501348050582E-16
q -4.624912819598642E-15 1.031491425716401E-14 2.118571090474887E-12 -1.226323041275121E-14 8.089290059123911E-13 1.423003035687969E-15
tp -9.143884684008331E-13 2.118571090474887E-12 1.497313937911211E-9 -9.557130338735083E-12 5.093934810549999E-10 -1.489820380024211E-12
node 5.317201689622418E-15 -1.226323041275121E-14 -9.557130338735083E-12 1.389631450612407E-9 -1.384998296129656E-9 -6.150793239155504E-11
peri -3.53161305685269E-13 8.089290059123911E-13 5.093934810549999E-10 -1.384998296129656E-9 1.5580080438718E-9 6.072183309967148E-11
i -6.808501348050582E-16 1.423003035687969E-15 -1.489820380024211E-12 -6.150793239155504E-11 6.072183309967148E-11 2.854850765392951E-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 16.45   n/a E2021B55  

100345 (1995 ST61)          Discovered 1995-Sep-25 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1995 ST61 = 2002 TF261 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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