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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .148387380756498 5.6915e-08  
a 3.034545799776621 2.5092e-08 au
q 2.584257496762135 1.7651e-07 au
i 8.20539887634318 5.6336e-06 deg
node 295.4061112628573 4.0519e-05 deg
peri 39.2019969712489 4.377e-05 deg
M 273.1255089028216 1.8608e-05 deg
tp 2459466.438658055777
(2021-Sep-08.93865806)
0.00010247 TDB
period 1930.807476183623
5.29
2.3948e-05
6.557e-08
d
yr
n .1864504899844107 2.3126e-09 deg/d
Q 3.484834102791106 2.8815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      397  
   data-arc span      7208 days (19.73 yr)  
   first obs. used      2000-09-01  
   last obs. used      2020-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59113  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:30:41  

Additional Information
 Earth MOID = 1.58 au 
 Jupiter MOID = 1.88829 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456837.5 (2014-Jun-29.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473673164468193 5.6895e-08  
q 2.587480182117064 1.7611e-07 au
tp 2457537.783002688707
(2016-May-29.28300269)
9.3838e-05 TDB
node 295.4207966077525 4.053e-05 deg
peri 39.71917346642918 4.3825e-05 deg
i 8.203318436381123 5.6322e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      397  
   data-arc span      7208 days (19.73 yr)  
   first obs. used      2000-09-01  
   last obs. used      2020-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59113  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:30:41  

Additional Information
 Jupiter MOID = 1.88829 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.237086136574986E-15 -9.945556426385201E-15 7.556370795276993E-13 -2.528917194537896E-15 1.133031851569497E-13 -3.744347718252425E-15
q -9.945556426385201E-15 3.101614822182518E-14 -1.757131287370899E-12 1.575121042399388E-14 -2.898511000377576E-13 1.266057820523143E-14
tp 7.556370795276993E-13 -1.757131287370899E-12 8.80565241128356E-9 3.244085446105952E-12 1.603171715063645E-9 -3.373998209527963E-12
node -2.528917194537896E-15 1.575121042399388E-14 3.244085446105952E-12 1.642696472967974E-9 -1.625184660537607E-9 5.493491010353612E-11
peri 1.133031851569497E-13 -2.898511000377576E-13 1.603171715063645E-9 -1.625184660537607E-9 1.920602834618588E-9 -5.507159575604782E-11
i -3.744347718252425E-15 1.266057820523143E-14 -3.373998209527963E-12 5.493491010353612E-11 -5.507159575604782E-11 3.172157373388815E-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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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