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120430 (2303 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2120430
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1839666933402448 4.9183e-08  
a 2.292191849197877 1.2187e-08 au
q 1.870504894199482 1.1477e-07 au
i 5.820931152846062 4.3763e-06 deg
node 217.1291420740294 5.2965e-05 deg
peri 161.4180254357885 5.4585e-05 deg
M 159.3169752412347 1.5114e-05 deg
tp 2458639.536732206346
(2019-Jun-05.03673221)
5.1371e-05 TDB
period 1267.57852451022
3.47
1.0109e-05
2.768e-08
d
yr
n .2840060738162951 2.2649e-09 deg/d
Q 2.713878804196271 1.4429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      407  
   data-arc span      15865 days (43.44 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59899  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:24  

Additional Information
 Earth MOID = .872624 au 
 Jupiter MOID = 2.75205 au 
 T_jup = 3.568 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457122.5 (2015-Apr-10.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1843494334505359 4.9445e-08  
q 1.869699176367188 1.1545e-07 au
tp 2457369.793024839212
(2015-Dec-13.29302484)
4.8078e-05 TDB
node 217.1707928778546 5.3007e-05 deg
peri 160.9814639784104 5.4598e-05 deg
i 5.81736578472652 4.3784e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      407  
   data-arc span      15865 days (43.44 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59899  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:24  

Additional Information
 Jupiter MOID = 2.75205 au 
 T_jup = 3.568 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.444761353455812E-15 -5.68809637614674E-15 -1.139421238591127E-12 -6.142647741862823E-15 -2.55968347609848E-13 -6.239231247562804E-15
q -5.68809637614674E-15 1.332969913675016E-14 2.711747741603039E-12 1.318585005727722E-14 6.070156975290773E-13 1.481738831009605E-14
tp -1.139421238591127E-12 2.711747741603039E-12 2.31148625862771E-9 1.902488049806356E-12 6.572797418342196E-10 5.7296872545863E-12
node -6.142647741862823E-15 1.318585005727722E-14 1.902488049806356E-12 2.809786481985823E-9 -2.794370458915014E-9 -7.096593730289984E-11
peri -2.55968347609848E-13 6.070156975290773E-13 6.572797418342196E-10 -2.794370458915014E-9 2.980956999913419E-9 7.217787397071886E-11
i -6.239231247562804E-15 1.481738831009605E-14 5.7296872545863E-12 -7.096593730289984E-11 7.217787397071886E-11 1.917062629397995E-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 MPO453675  

120430 (2303 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 2303 T-3 = 2001 RS31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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