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(2011 SZ21)
Classification: Mars-crossing Asteroid          SPK-ID: 3578910
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ 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 .5585309880679901 1.527e-07  
a 2.95106183785945 8.0493e-08 au
q 1.302802353710073 4.4554e-07 au
i 16.48048072992612 1.1163e-05 deg
node 229.401583122431 4.1754e-05 deg
peri 41.22849143270113 6.2215e-05 deg
M 326.6517373478579 1.2379e-05 deg
tp 2459372.028624287077
(2021-Jun-06.52862429)
6.2579e-05 TDB
period 1851.679812752745
5.07
7.5759e-05
2.074e-07
d
yr
n .1944180616544156 7.9544e-09 deg/d
Q 4.599321322008826 1.2545e-07 au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      7270 days (19.90 yr)  
   first obs. used      2001-06-23  
   last obs. used      2021-05-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-21 22:29:38  

Additional Information
 Earth MOID = .335741 au 
 Jupiter MOID = .863899 au 
 T_jup = 2.961 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456687.5 (2014-Jan-30.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5608519197292756 1.5469e-07  
q 1.295716121479269 4.5566e-07 au
tp 2457516.120485837144
(2016-May-07.62048584)
9.9764e-05 TDB
node 230.262075757758 4.176e-05 deg
peri 40.37889568586872 6.0064e-05 deg
i 16.59534731433239 1.0999e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      7270 days (19.90 yr)  
   first obs. used      2001-06-23  
   last obs. used      2021-05-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-21 22:29:38  

Additional Information
 Jupiter MOID = .863899 au 
 T_jup = 2.961 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.393035566527285E-14 -7.034279601853989E-14 4.552341281120279E-12 -1.466671033640287E-12 -4.423174547349889E-13 -2.926147167469248E-13
q -7.034279601853989E-14 2.076252295596356E-13 -1.582478074141448E-11 4.620708786170268E-12 -1.38355048800186E-13 1.001838182598538E-12
tp 4.552341281120279E-12 -1.582478074141448E-11 9.952915841505482E-9 -5.806463934703889E-10 4.208540082193021E-9 -6.708331683390762E-10
node -1.466671033640287E-12 4.620708786170268E-12 -5.806463934703889E-10 1.74390509924472E-9 -1.689687331707147E-9 -7.665292482807042E-11
peri -4.423174547349889E-13 -1.38355048800186E-13 4.208540082193021E-9 -1.689687331707147E-9 3.607624461730449E-9 -1.807811885949953E-10
i -2.926147167469248E-13 1.001838182598538E-12 -6.708331683390762E-10 -7.665292482807042E-11 -1.807811885949953E-10 1.209840590479481E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.5   n/a MPO209996  

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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