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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 
[ show covariance matrix ]

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1985-Mar-17 13:20 < 00:01 Jupiter 1.96950260955807 1.96950210808084 1.9695031110353 4.37339165072783 4.27392279173089 2446142.055510176 0.997890627726771 81.1833510422402 21.8285417950451 85.4946517279634 2973772.33131649 T 20 CATAB v2.0f-lin.ifort 2021-Apr-13 18:12:26 2021-Apr-13 18:12
2091-Oct-16 12:36 00:02 Jupiter 1.96057147356951 1.96057093631703 1.96057201082343 4.28348970159748 4.18141450591691 2485071.024655090 2.40407181837594 140.685641462708 18.4627592119818 82.61126849023 3024747.11620231 T 20 CATAB v2.0f-lin.ifort 2021-Apr-13 18:12:26 2021-Apr-13 18:12
2198-May-18 04:26 00:06 Jupiter 1.96138487255378 1.96138395297876 1.96138579214752 4.20873062727708 4.10484044385423 2524000.684963337 5.79468671968346 343.243987044322 17.1106749466339 82.3621930929923 3053497.40203798 T 20 CATAB v2.0f-lin.ifort 2021-Apr-13 18:12:26 2021-Apr-13 18:12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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