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146121 (2000 RR18)
Classification: Main-belt Asteroid          SPK-ID: 2146121
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1483873647130403 6.0216e-08  
a 3.034545807194451 2.5664e-08 au
q 2.584257551763861 1.849e-07 au
i 8.205399010365667 5.9004e-06 deg
node 295.4061024555487 4.0997e-05 deg
peri 39.20198768724697 4.4232e-05 deg
M 273.1255176667436 1.8696e-05 deg
tp 2459466.438612760213
(2021-Sep-08.93861276)
0.00010305 TDB
period 1930.8074832633
5.29
2.4494e-05
6.706e-08
d
yr
n .1864504893007542 2.3653e-09 deg/d
Q 3.484834062625041 2.9473e-08 au
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      6791 days (18.59 yr)  
   first obs. used      2000-09-01  
   last obs. used      2019-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60167  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:48:50  

Additional Information
 Earth MOID = 1.58 au 
 Jupiter MOID = 1.88829 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456745.5 (2014-Mar-29.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473177862946078 6.0162e-08  
q 2.587651590011023 1.8432e-07 au
tp 2457537.928162137025
(2016-May-29.42816214)
9.4003e-05 TDB
node 295.4212919111499 4.1008e-05 deg
peri 39.73588629343522 4.4291e-05 deg
i 8.20333653267768 5.8988e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      6791 days (18.59 yr)  
   first obs. used      2000-09-01  
   last obs. used      2019-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60167  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:48:50  

Additional Information
 Jupiter MOID = 1.88829 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.619437166167101E-15 -1.100937666535593E-14 8.563906150038411E-13 -3.669340644693481E-15 1.022172840346532E-13 -4.366203303167939E-15
q -1.100937666535593E-14 3.397482676473213E-14 -2.042426476000863E-12 1.959810124293326E-14 -2.606659595661687E-13 1.458845718430059E-14
tp 8.563906150038411E-13 -2.042426476000863E-12 8.83663525934486E-9 -2.067659938006195E-12 1.606551480688724E-9 -4.950468789601821E-12
node -3.669340644693481E-15 1.959810124293326E-14 -2.067659938006195E-12 1.681686677374173E-9 -1.664862720958819E-9 6.580319952268418E-11
peri 1.022172840346532E-13 -2.606659595661687E-13 1.606551480688724E-9 -1.664862720958819E-9 1.961712559468169E-9 -6.612702539024112E-11
i -4.366203303167939E-15 1.458845718430059E-14 -4.950468789601821E-12 6.580319952268418E-11 -6.612702539024112E-11 3.479632717293844E-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 14.9   n/a MPO426922  
diameter diameter 7.457 km 0.285 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

146121 (2000 RR18)          Discovered 2000-Sep-01 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

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