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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 
[ show covariance matrix ]

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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