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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 ]

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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1485649585975001 5.6871e-08  
a 3.036051510683639 2.4687e-08 au
q 2.585000643699046 1.7682e-07 au
i 8.205206621501324 5.6007e-06 deg
node 295.4066688008045 3.999e-05 deg
peri 39.03100668731685 4.316e-05 deg
M 310.5811003399501 1.8707e-05 deg
tp 2459465.748356081562
(2021-Sep-08.24835608)
0.00010196 TDB
period 1932.244725119925
5.29
2.3568e-05
6.453e-08
d
yr
n .1863118037378296 2.2724e-09 deg/d
Q 3.487102377668232 2.8355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      7208 days (19.73 yr)  
   first obs. used      2000-09-01  
   last obs. used      2020-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59265  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:59:48  

Additional Information
 Earth MOID = 1.57876 au 
 Jupiter MOID = 1.88528 au 
 T_jup = 3.209 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456895.5 (2014-Aug-26.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473694702225428 5.6897e-08  
q 2.587544546832163 1.7616e-07 au
tp 2457537.714125916439
(2016-May-29.21412592)
9.2856e-05 TDB
node 295.4199687231179 4.0009e-05 deg
peri 39.70537933141514 4.3217e-05 deg
i 8.2032992261346 5.5989e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      7208 days (19.73 yr)  
   first obs. used      2000-09-01  
   last obs. used      2020-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59265  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:59:48  

Additional Information
 Jupiter MOID = 1.88528 au 
 T_jup = 3.209 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.237259692334587E-15 -9.948986956910867E-15 7.648750627133363E-13 -3.149823269764304E-15 1.163413918973946E-13 -3.693709313016988E-15
q -9.948986956910867E-15 3.10311125079534E-14 -1.754762076415657E-12 1.754455999442662E-14 -2.912613202564583E-13 1.248354350552385E-14
tp 7.648750627133363E-13 -1.754762076415657E-12 8.622188965045106E-9 2.767156267486003E-12 1.556839493319495E-9 -3.145853493980908E-12
node -3.149823269764304E-15 1.754455999442662E-14 2.767156267486003E-12 1.600704831424023E-9 -1.583707975139854E-9 5.889148861787686E-11
peri 1.163413918973946E-13 -2.912613202564583E-13 1.556839493319495E-9 -1.583707975139854E-9 1.867702760820448E-9 -5.893251517251298E-11
i -3.693709313016988E-15 1.248354350552385E-14 -3.145853493980908E-12 5.889148861787686E-11 -5.893251517251298E-11 3.134726535135635E-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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