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JPL Small-Body Database Browser
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249919 (2001 SL261)
Classification: Main-belt Asteroid          SPK-ID: 2249919
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110013434004387 4.9131e-08  
a 2.769274769148217 2.0615e-08 au
q 2.461881549527825 1.3551e-07 au
i 10.55369844721104 4.9223e-06 deg
node 209.5613243999277 2.8911e-05 deg
peri 101.9681372351386 3.7675e-05 deg
M 75.72592159446241 2.1751e-05 deg
tp 2458646.429644654388
(2019-Jun-11.92964465)
0.00010213 TDB
period 1683.245647468507
4.61
1.8795e-05
5.146e-08
d
yr
n .2138725268895938 2.3881e-09 deg/d
Q 3.076667988768609 2.2903e-08 au
  Orbit Determination Parameters
   # obs. used (total)      334  
   data-arc span      6613 days (18.11 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55996  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:48:47  

Additional Information
 Earth MOID = 1.47535 au 
 Jupiter MOID = 2.20756 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457521.5 (2016-May-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1128325087242049 4.9075e-08  
q 2.456074986254775 1.3578e-07 au
tp 2456965.003624275691
(2014-Nov-03.50362428)
0.00010448 TDB
node 209.589422536864 2.8886e-05 deg
peri 102.3365501501957 3.7415e-05 deg
i 10.55914314746238 4.928e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      334  
   data-arc span      6613 days (18.11 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55996  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:48:47  

Additional Information
 Jupiter MOID = 2.20756 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.408316844036394E-15 -6.602525777573143E-15 1.036619648962086E-12 9.518972770072541E-16 2.269002739914525E-13 -8.209579930557746E-15
q -6.602525777573143E-15 1.843618265849845E-14 -3.474882076264824E-12 -1.287441345135858E-15 -7.448289052193824E-13 2.305976281739381E-14
tp 1.036619648962086E-12 -3.474882076264824E-12 1.091563136897374E-8 -1.931090036676277E-11 2.515893933412274E-9 -4.675935742841265E-12
node 9.518972770072541E-16 -1.287441345135858E-15 -1.931090036676277E-11 8.344288373854825E-10 -8.243325074014931E-10 -4.182294919888139E-11
peri 2.269002739914525E-13 -7.448289052193824E-13 2.515893933412274E-9 -8.243325074014931E-10 1.399854878833638E-9 4.017377947777987E-11
i -8.209579930557746E-15 2.305976281739381E-14 -4.675935742841265E-12 -4.182294919888139E-11 4.017377947777987E-11 2.42850721193002E-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 16.1   n/a MPO440261  

249919 (2001 SL261)          Discovered 2001-Sep-20 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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