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121339 (1999 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2121339
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074737858093818 4.435e-08  
a 2.843273696654117 1.6835e-08 au
q 2.537696308382463 1.2723e-07 au
i 1.623467815297879 4.6668e-06 deg
node 203.5280289800025 0.00014602 deg
peri 162.776162596595 0.0001471 deg
M 160.5126896236118 1.8917e-05 deg
tp 2458419.711695815864
(2018-Oct-28.21169582)
8.9954e-05 TDB
period 1751.162416911745
4.79
1.5553e-05
4.258e-08
d
yr
n .2055777331236222 1.8258e-09 deg/d
Q 3.14885108492577 1.8644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      559  
   data-arc span      9739 days (26.66 yr)  
   first obs. used      1994-08-31  
   last obs. used      2021-04-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:04:47  

Additional Information
 Earth MOID = 1.53456 au 
 Jupiter MOID = 2.31256 au 
 T_jup = 3.299 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.81   n/a MPCxxxxx  

121339 (1999 TO15)          Discovered 1999-Oct-13 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1999 TO15 = 1999 ST2 = 2002 GY135 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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