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181905 (1999 SR1)
Classification: Main-belt Asteroid          SPK-ID: 2181905
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1910313293414492 3.9844e-08  
a 2.211416600826729 1.2843e-08 au
q 1.78896674784305 8.7328e-08 au
i 7.607429262564746 6.8149e-06 deg
node 43.8481254624384 3.5034e-05 deg
peri 264.2549992561915 4.3239e-05 deg
M 210.5561586073545 3.0803e-05 deg
tp 2459699.131598751568
(2022-Apr-29.63159875)
0.00010596 TDB
period 1201.169441830197
3.29
1.0464e-05
2.865e-08
d
yr
n .2997079241805182 2.6109e-09 deg/d
Q 2.633866453810408 1.5297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      287  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1999-09-20  
   last obs. used      2021-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51872  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:54  

Additional Information
 Earth MOID = .792317 au 
 Jupiter MOID = 2.64501 au 
 T_jup = 3.622 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.08   n/a MPCxxxxx  

181905 (1999 SR1)          Discovered 1999-Sep-20 by Sarounova, L. at Ondrejov
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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