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193978 (2001 RD121)
Classification: Main-belt Asteroid          SPK-ID: 2193978
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1989977101228932 6.9685e-08  
a 2.30073349990555 1.4314e-08 au
q 1.842892801821316 1.6161e-07 au
i 2.920358062151121 6.9594e-06 deg
node 45.01359668311833 0.00013928 deg
peri 275.6381130605315 0.00014055 deg
M 151.3020958067582 1.8109e-05 deg
tp 2458464.776935990134
(2018-Dec-12.27693599)
6.2576e-05 TDB
period 1274.67040040127
3.49
1.1895e-05
3.257e-08
d
yr
n .2824259509647913 2.6357e-09 deg/d
Q 2.758574197989785 1.7162e-08 au
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      6135 days (16.80 yr)  
   first obs. used      2001-08-25  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66375  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 15:09:13  

Additional Information
 Earth MOID = .832989 au 
 Jupiter MOID = 2.55646 au 
 T_jup = 3.563 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457002.5 (2014-Dec-11.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1998435074393635 6.9824e-08  
q 1.84036664282041 1.6205e-07 au
tp 2457190.717383812687
(2015-Jun-17.21738381)
6.0085e-05 TDB
node 45.02460322080157 0.00013925 deg
peri 275.7156176523756 0.00014051 deg
i 2.921760199524194 6.963e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      6135 days (16.80 yr)  
   first obs. used      2001-08-25  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66375  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 15:09:13  

Additional Information
 Jupiter MOID = 2.55646 au 
 T_jup = 3.563 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.875411950356718E-15 -1.128672754479773E-14 2.161888193054945E-12 -1.252508640589284E-13 6.686574168394045E-13 -2.552438013132168E-15
q -1.128672754479773E-14 2.625878936548099E-14 -4.921286435815847E-12 2.854844886379623E-13 -1.525607360619691E-12 6.290703526597592E-15
tp 2.161888193054945E-12 -4.921286435815847E-12 3.610227895427324E-9 -9.690209317279673E-11 1.183770890687438E-9 -3.118941647549791E-12
node -1.252508640589284E-13 2.854844886379623E-13 -9.690209317279673E-11 1.938924069419454E-8 -1.939024313647739E-8 -4.558308294138065E-10
peri 6.686574168394045E-13 -1.525607360619691E-12 1.183770890687438E-9 -1.939024313647739E-8 1.974255573291158E-8 4.5435072124488E-10
i -2.552438013132168E-15 6.290703526597592E-15 -3.118941647549791E-12 -4.558308294138065E-10 4.5435072124488E-10 4.848301132174531E-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 17.3   n/a MPO449958  

193978 (2001 RD121)          Discovered 2001-Sep-12 by LINEAR at Socorro
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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