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135839 (2002 SA21)
Classification: Main-belt Asteroid          SPK-ID: 2135839
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03955414730746203 5.0485e-08  
a 2.694755262083453 1.671e-08 au
q 2.588166515489445 1.3147e-07 au
i 6.361809889822304 5.5353e-06 deg
node 177.8574766512913 3.6123e-05 deg
peri 163.5450808268164 6.9301e-05 deg
M 65.51468205319418 5.8565e-05 deg
tp 2458906.455163977653
(2020-Feb-26.95516398)
0.00026242 TDB
period 1615.762110882197
4.42
1.5029e-05
4.115e-08
d
yr
n .222805076053827 2.0724e-09 deg/d
Q 2.80134400867746 1.7371e-08 au
  Orbit Determination Parameters
   # obs. used (total)      511  
   data-arc span      6705 days (18.36 yr)  
   first obs. used      2002-09-07  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:14:49  

Additional Information
 Earth MOID = 1.57882 au 
 Jupiter MOID = 2.34498 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457259.5 (2015-Aug-25.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04168986780678745 5.0718e-08  
q 2.583116627425 1.3254e-07 au
tp 2457291.880130961188
(2015-Sep-26.38013096)
0.00024634 TDB
node 177.9619879220899 3.6081e-05 deg
peri 163.8706280658546 6.6588e-05 deg
i 6.364880889394636 5.5393e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      511  
   data-arc span      6705 days (18.36 yr)  
   first obs. used      2002-09-07  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:14:49  

Additional Information
 Jupiter MOID = 2.34498 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.57234134386257E-15 -6.678114736751287E-15 3.786619348663687E-12 -1.651356139049838E-14 8.44001625407252E-13 -2.874818762020441E-15
q -6.678114736751287E-15 1.756679568625235E-14 -9.849412968247229E-12 4.242800651571408E-14 -2.199647271566212E-12 8.283920411558869E-15
tp 3.786619348663687E-12 -9.849412968247229E-12 6.068579753051564E-8 -2.889609520611526E-11 1.38007159548955E-8 -1.104544890824374E-11
node -1.651356139049838E-14 4.242800651571408E-14 -2.889609520611526E-11 1.301858042532742E-9 -1.299502528128857E-9 2.265866718485576E-11
peri 8.44001625407252E-13 -2.199647271566212E-12 1.38007159548955E-8 -1.299502528128857E-9 4.433953501806424E-9 -2.502194940219666E-11
i -2.874818762020441E-15 8.283920411558869E-15 -1.104544890824374E-11 2.265866718485576E-11 -2.502194940219666E-11 3.06843243482254E-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 15.84   n/a MPCxxxxx  

135839 (2002 SA21)          Discovered 2002-Sep-26 by NEAT at Palomar
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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