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21681 (1999 RN32)
Classification: Main-belt Asteroid          SPK-ID: 2021681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09618794286846588 5.5133e-08  
a 3.173059288278786 2.0007e-08 au
q 2.867849242739571 1.8429e-07 au
i 9.263071533508576 4.9232e-06 deg
node 177.3401147360604 2.6545e-05 deg
peri 200.4664482980064 3.4185e-05 deg
M 298.2149585850316 2.4512e-05 deg
tp 2459750.820719038182
(2022-Jun-20.32071904)
0.00014216 TDB
period 2064.503898233907
5.65
1.9526e-05
5.346e-08
d
yr
n .1743760330547035 1.6493e-09 deg/d
Q 3.478269333818001 2.1932e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1535  
   data-arc span      10280 days (28.15 yr)  
   first obs. used      1993-06-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5337  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:02  

Additional Information
 Earth MOID = 1.87012 au 
 Jupiter MOID = 1.99005 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457222.5 (2015-Jul-19.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09692183278236641 5.4903e-08  
q 2.861538904970167 1.8274e-07 au
tp 2457701.090095341613
(2016-Nov-08.59009534)
0.00013426 TDB
node 177.4398071586148 2.6578e-05 deg
peri 202.2789474021776 3.4253e-05 deg
i 9.259925081516876 4.9234e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1535  
   data-arc span      10280 days (28.15 yr)  
   first obs. used      1993-06-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5337  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:02  

Additional Information
 Jupiter MOID = 1.99005 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.014297413569413E-15 -9.99310301284122E-15 -1.381958717932286E-12 -8.562734562138698E-15 -1.393270144301413E-13 2.011100346076187E-15
q -9.99310301284122E-15 3.33932285209185E-14 5.262339577353701E-12 2.676007786683492E-14 5.626479652543614E-13 -5.920266611806208E-15
tp -1.381958717932286E-12 5.262339577353701E-12 1.802568171780416E-8 -1.900158361044659E-12 2.919071297427405E-9 5.937261415028503E-12
node -8.562734562138698E-15 2.676007786683492E-14 -1.900158361044659E-12 7.0639787608307E-10 -6.974622099810659E-10 3.648314031900389E-11
peri -1.393270144301413E-13 5.626479652543614E-13 2.919071297427405E-9 -6.974622099810659E-10 1.173280139898336E-9 -3.498506754147294E-11
i 2.011100346076187E-15 -5.920266611806208E-15 5.937261415028503E-12 3.648314031900389E-11 -3.498506754147294E-11 2.423985566791557E-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 13.52   n/a MPO636389  
diameter diameter 8.480 km 0.371 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.118   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21681 (1999 RN32)          Discovered 1999-Sep-09 by Korlevic, K. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RN32 = 1994 WP2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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