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135309 (2001 ST261)
Classification: Main-belt Asteroid          SPK-ID: 2135309
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09545275355987791 3.5132e-08  
a 3.048617012616984 2.2075e-08 au
q 2.757618124213204 1.0598e-07 au
i 10.39486276169655 5.9893e-06 deg
node 306.674937218812 2.4949e-05 deg
peri 113.3179964497937 4.1882e-05 deg
M 140.4333958079694 3.3752e-05 deg
tp 2458442.061052289413
(2018-Nov-19.56105229)
0.0001805 TDB
period 1944.252786916634
5.32
2.1118e-05
5.782e-08
d
yr
n .1851611078675214 2.0112e-09 deg/d
Q 3.339615901020764 2.4182e-08 au
  Orbit Determination Parameters
   # obs. used (total)      736  
   data-arc span      6938 days (19.00 yr)  
   first obs. used      2001-05-24  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:12:25  

Additional Information
 Earth MOID = 1.79086 au 
 Jupiter MOID = 1.94667 au 
 T_jup = 3.206 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457451.5 (2016-Mar-04.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0953073851303856 3.5021e-08  
q 2.758078637401199 1.0553e-07 au
tp 2456501.396397578564
(2013-Jul-27.89639758)
0.00017821 TDB
node 306.6920042325754 2.4948e-05 deg
peri 114.1464762488632 4.1955e-05 deg
i 10.39506790480796 5.9891e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      736  
   data-arc span      6938 days (19.00 yr)  
   first obs. used      2001-05-24  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:12:25  

Additional Information
 Jupiter MOID = 1.94667 au 
 T_jup = 3.206 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.226459653960144E-15 -3.63140849860569E-15 -6.017581826013351E-13 -4.924842251677996E-15 -1.25111052616744E-13 -1.372316529010516E-15
q -3.63140849860569E-15 1.113696010341903E-14 2.075923343113127E-12 1.335758532868361E-14 4.628562971731929E-13 4.773255854819671E-15
tp -6.017581826013351E-13 2.075923343113127E-12 3.176011066444988E-8 -6.243541395262622E-12 6.026618952540109E-9 -7.43036494221163E-12
node -4.924842251677996E-15 1.335758532868361E-14 -6.243541395262622E-12 6.223789900716069E-10 -6.132146009334335E-10 6.099445850190032E-11
peri -1.25111052616744E-13 4.628562971731929E-13 6.026618952540109E-9 -6.132146009334335E-10 1.760218624791804E-9 -6.133911365336757E-11
i -1.372316529010516E-15 4.773255854819671E-15 -7.43036494221163E-12 6.099445850190032E-11 -6.133911365336757E-11 3.586965548250044E-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 14.48   n/a E2021B55  

135309 (2001 ST261)          Discovered 2001-Sep-21 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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