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101926 (1999 RT18)
Classification: Main-belt Asteroid          SPK-ID: 2101926
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2841666541822056 5.255e-08  
a 3.117498226375269 2.1359e-08 au
q 2.231609185967248 1.6695e-07 au
i 9.032309509276544 5.9458e-06 deg
node 339.0026603215567 3.0821e-05 deg
peri 22.95374610100136 3.2223e-05 deg
M 270.7449879418444 1.4265e-05 deg
tp 2459498.968663906932
(2021-Oct-11.46866391)
8.3757e-05 TDB
period 2010.516999197454
5.50
2.0662e-05
5.657e-08
d
yr
n .1790584213631134 1.8402e-09 deg/d
Q 4.00338726678329 2.7429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      7652 days (20.95 yr)  
   first obs. used      1999-07-16  
   last obs. used      2020-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54604  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Earth MOID = 1.23161 au 
 Jupiter MOID = 1.48796 au 
 T_jup = 3.135 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456767.5 (2014-Apr-20.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .284674947611412 5.2415e-08  
q 2.229085485968175 1.6621e-07 au
tp 2457491.531739766884
(2016-Apr-13.03173977)
6.7989e-05 TDB
node 339.0401752645409 3.0826e-05 deg
peri 23.31643468528016 3.2227e-05 deg
i 9.033411849809907 5.9467e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      7652 days (20.95 yr)  
   first obs. used      1999-07-16  
   last obs. used      2020-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54604  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Jupiter MOID = 1.48796 au 
 T_jup = 3.135 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.747371796344093E-15 -8.674950163128767E-15 -2.843876782133025E-13 2.6233754252839E-15 -6.206190146246774E-14 1.291038707425144E-15
q -8.674950163128767E-15 2.762495744432141E-14 1.596786480838956E-12 -8.013943933822816E-15 2.784705026307298E-13 -3.233518420909415E-15
tp -2.843876782133025E-13 1.596786480838956E-12 4.622448018864524E-9 -1.131012970503971E-11 6.655130607836096E-10 2.402481279033292E-12
node 2.6233754252839E-15 -8.013943933822816E-15 -1.131012970503971E-11 9.502153061927516E-10 -9.398320904918263E-10 2.773100180709557E-11
peri -6.206190146246774E-14 2.784705026307298E-13 6.655130607836096E-10 -9.398320904918263E-10 1.038567841101679E-9 -2.712424520941297E-11
i 1.291038707425144E-15 -3.233518420909415E-15 2.402481279033292E-12 2.773100180709557E-11 -2.712424520941297E-11 3.536362375666596E-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 14.1   n/a MPO469026  
diameter diameter 5.314 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.172   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101926 (1999 RT18)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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