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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812061039615066 4.5909e-08  
a 2.978318675058749 1.7155e-08 au
q 2.438629151595557 1.4159e-07 au
i 11.84374787250113 4.1252e-06 deg
node 299.1853055866076 2.1369e-05 deg
peri 114.4394354872453 2.7365e-05 deg
M 39.9551238901845 1.2613e-05 deg
tp 2459188.134815580368
(2020-Dec-04.63481558)
6.6555e-05 TDB
period 1877.392912038874
5.14
1.6221e-05
4.441e-08
d
yr
n .191755278126109 1.6568e-09 deg/d
Q 3.518008198521942 2.0264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      9235 days (25.28 yr)  
   first obs. used      1995-12-19  
   last obs. used      2021-04-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39314  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:52  

Additional Information
 Earth MOID = 1.47853 au 
 Jupiter MOID = 1.92528 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457960.5 (2017-Jul-26.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795687254619927 4.4827e-08  
q 2.447233684015663 1.3661e-07 au
tp 2457300.338731546280
(2015-Oct-04.83873155)
7.6613e-05 TDB
node 299.6157054649142 2.1489e-05 deg
peri 112.7965292306579 2.769e-05 deg
i 11.8017151512829 4.1102e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      9235 days (25.28 yr)  
   first obs. used      1995-12-19  
   last obs. used      2021-04-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39314  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:52  

Additional Information
 Jupiter MOID = 1.92528 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.009471777565681E-15 -6.09603442647951E-15 1.073825871386133E-12 -1.688149551656912E-14 2.979239731388655E-13 -1.082663068890869E-14
q -6.09603442647951E-15 1.866218468847828E-14 -3.715994475752355E-12 5.516356223408467E-14 -9.955473489715063E-13 3.30681834256108E-14
tp 1.073825871386133E-12 -3.715994475752355E-12 5.869621949262711E-9 -6.60177469771358E-12 1.356543389190695E-9 -4.120097310098091E-12
node -1.688149551656912E-14 5.516356223408467E-14 -6.60177469771358E-12 4.617687985950653E-10 -4.535651628949097E-10 -2.38690420444207E-11
peri 2.979239731388655E-13 -9.955473489715063E-13 1.356543389190695E-9 -4.535651628949097E-10 7.667528293774473E-10 2.184053086634732E-11
i -1.082663068890869E-14 3.30681834256108E-14 -4.120097310098091E-12 -2.38690420444207E-11 2.184053086634732E-11 1.68934438578934E-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 15.01   n/a MPCxxxxx  

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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