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91560 (1999 RW226)
Classification: Main-belt Asteroid          SPK-ID: 2091560
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808538344746665 4.6446e-08  
a 2.977097915519943 2.2743e-08 au
q 2.438678341891625 1.4245e-07 au
i 11.84407683728501 8.4693e-06 deg
node 299.1839177943658 2.3312e-05 deg
peri 114.412323162354 3.2788e-05 deg
M 324.0175439618121 2.3165e-05 deg
tp 2459188.032441397516
(2020-Dec-04.53244140)
0.00012149 TDB
period 1876.238765676696
5.14
2.15e-05
5.886e-08
d
yr
n .1918732341457406 2.1987e-09 deg/d
Q 3.515517489148262 2.6856e-08 au
  Orbit Determination Parameters
   # obs. used (total)      521  
   data-arc span      8660 days (23.71 yr)  
   first obs. used      1995-12-19  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44476  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:58:07  

Additional Information
 Earth MOID = 1.47895 au 
 Jupiter MOID = 1.92633 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456805.5 (2014-May-28.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1801554782379654 4.4981e-08  
q 2.443573880450303 1.374e-07 au
tp 2457298.701227290233
(2015-Oct-03.20122729)
0.00011586 TDB
node 299.700492830923 2.3355e-05 deg
peri 112.2324534775433 3.2912e-05 deg
i 11.81402205657662 8.4627e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      521  
   data-arc span      8660 days (23.71 yr)  
   first obs. used      1995-12-19  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44476  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:58:07  

Additional Information
 Jupiter MOID = 1.92633 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.023285331519318E-15 -6.121808005216856E-15 1.211527958912682E-12 -9.179484922093498E-15 3.099361397425261E-13 -2.370165388444724E-15
q -6.121808005216856E-15 1.887805762995897E-14 -2.972901747534449E-12 2.633557927207181E-14 -8.269189396912495E-13 7.701441517152333E-15
tp 1.211527958912682E-12 -2.972901747534449E-12 1.342250045841136E-8 -1.575470040911266E-11 2.690210697077362E-9 -1.765641761214406E-11
node -9.179484922093498E-15 2.633557927207181E-14 -1.575470040911266E-11 5.454640929556014E-10 -5.371649663275083E-10 3.195170226812058E-11
peri 3.099361397425261E-13 -8.269189396912495E-13 2.690210697077362E-9 -5.371649663275083E-10 1.083215534739557E-9 -3.51302974684603E-11
i -2.370165388444724E-15 7.701441517152333E-15 -1.765641761214406E-11 3.195170226812058E-11 -3.51302974684603E-11 7.161803444992261E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO493512  

91560 (1999 RW226)          Discovered 1999-Sep-05 by CSS at Catalina
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Alternate Designations
 1999 RW226 = 1995 YG13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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