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JPL Small-Body Database Browser
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393508 (2002 RT261)
Classification: Main-belt Asteroid          SPK-ID: 2393508
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2277092633657009 4.4651e-08  
a 2.597687510523094 1.8614e-08 au
q 2.006170001047599 1.1042e-07 au
i 3.605281822440589 9.7831e-06 deg
node 33.26166078701054 8.0936e-05 deg
peri 284.3528468056185 8.6559e-05 deg
M 101.1403188153197 2.8426e-05 deg
tp 2458570.864060048524
(2019-Mar-28.36406005)
0.00011774 TDB
period 1529.251046409629
4.19
1.6437e-05
4.5e-08
d
yr
n .2354093533858989 2.5303e-09 deg/d
Q 3.189205019998589 2.2853e-08 au
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      7763 days (21.25 yr)  
   first obs. used      1998-10-18  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64571  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:51:01  

Additional Information
 Earth MOID = .996704 au 
 Jupiter MOID = 2.13433 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457427.5 (2016-Feb-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291078363264702 4.4883e-08  
q 2.001283257210325 1.1109e-07 au
tp 2457043.077723735364
(2015-Jan-20.57772374)
0.0001073 TDB
node 33.2724979084377 8.0879e-05 deg
peri 284.4736810563327 8.6456e-05 deg
i 3.608712825975682 9.7858e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      7763 days (21.25 yr)  
   first obs. used      1998-10-18  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64571  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:51:01  

Additional Information
 Jupiter MOID = 2.13433 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.014465988841584E-15 -4.953863889152686E-15 1.510069734138131E-12 -2.087281640307135E-14 4.338913010848532E-13 -2.662943281890783E-15
q -4.953863889152686E-15 1.234156984323243E-14 -3.132360880110036E-12 4.230602426654293E-14 -8.972131458251866E-13 6.68304315877028E-15
tp 1.510069734138131E-12 -3.132360880110036E-12 1.15125059072446E-8 -1.345236484220406E-10 3.29457597662327E-9 -1.94101304167124E-12
node -2.087281640307135E-14 4.230602426654293E-14 -1.345236484220406E-10 6.541381482895274E-9 -6.564013948832109E-9 1.726299508314964E-10
peri 4.338913010848532E-13 -8.972131458251866E-13 3.29457597662327E-9 -6.564013948832109E-9 7.474666049574734E-9 -1.727444262306474E-10
i -2.662943281890783E-15 6.68304315877028E-15 -1.94101304167124E-12 1.726299508314964E-10 -1.727444262306474E-10 9.576157710483783E-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 17.2   n/a MPO440698  

393508 (2002 RT261)          Discovered 2002-Sep-05 by LINEAR at Socorro
Reference: Last Updated: 2014-05-15

Alternate Designations
 2002 RT261 = 2006 ON13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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