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413553 (2005 SR221)
Classification: Main-belt Asteroid          SPK-ID: 2413553
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1215203723190956 6.306e-08  
a 2.72150637904797 2.5558e-08 au
q 2.390787910597266 1.7688e-07 au
i 13.27906289598037 6.4479e-06 deg
node 289.2382490817761 2.3029e-05 deg
peri 64.5008012703489 3.3124e-05 deg
M 124.7996580489489 2.2811e-05 deg
tp 2458432.009310480478
(2018-Nov-09.50931048)
0.0001026 TDB
period 1639.881482261415
4.49
2.31e-05
6.324e-08
d
yr
n .2195280597373147 3.0924e-09 deg/d
Q 3.052224847498673 2.8663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      246  
   data-arc span      5228 days (14.31 yr)  
   first obs. used      2005-09-30  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 07:00:27  

Additional Information
 Earth MOID = 1.41716 au 
 Jupiter MOID = 2.3849 au 
 T_jup = 3.309 
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Orbital Elements at Epoch 2457724.5 (2016-Dec-02.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1207887701081772 6.3424e-08  
q 2.394184823362036 1.7762e-07 au
tp 2458430.012607593601
(2018-Nov-07.51260759)
0.00010295 TDB
node 289.3304434503913 2.3037e-05 deg
peri 63.86311004104157 3.3135e-05 deg
i 13.27128364202877 6.4477e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      246  
   data-arc span      5228 days (14.31 yr)  
   first obs. used      2005-09-30  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 07:00:27  

Additional Information
 Jupiter MOID = 2.3849 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.022652267739869E-15 -1.117739557986741E-14 -2.887318902135204E-12 1.576476530387392E-14 -7.32979173880599E-13 -7.109520828035009E-15
q -1.117739557986741E-14 3.154923450691484E-14 8.147112612619687E-12 -4.428659512822461E-14 2.01374172466077E-12 2.096059831809263E-14
tp -2.887318902135204E-12 8.147112612619687E-12 1.059779365836258E-8 -2.942815169024406E-11 2.466206182483615E-9 6.363974886699176E-12
node 1.576476530387392E-14 -4.428659512822461E-14 -2.942815169024406E-11 5.30685755670125E-10 -5.231846220960476E-10 5.053741962679349E-11
peri -7.32979173880599E-13 2.01374172466077E-12 2.466206182483615E-9 -5.231846220960476E-10 1.097955009491374E-9 -4.800080079742108E-11
i -7.109520828035009E-15 2.096059831809263E-14 6.363974886699176E-12 5.053741962679349E-11 -4.800080079742108E-11 4.157327338984007E-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 15.9   n/a MPO455944  

413553 (2005 SR221)          Discovered 2005-Sep-30 by CSS at Catalina
Reference: Last Updated: 2014-11-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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