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233971 (1991 TD2)
Classification: Main-belt Asteroid          SPK-ID: 2233971
[ 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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174279669255122 3.6956e-08  
a 2.244811944941358 1.0731e-08 au
q 1.756727047622654 8.1892e-08 au
i 6.568488825818703 5.4472e-06 deg
node 177.9974573886017 3.4978e-05 deg
peri 128.3758949997744 3.7937e-05 deg
M 237.7754506815111 1.673e-05 deg
tp 2459417.584756443057
(2021-Jul-22.08475644)		 5.9322e-05 TDB
period 1228.480801579747
3.36		 8.8089e-06
2.412e-08		 d
yr
n .2930448726077471 2.1013e-09 deg/d
Q 2.732896842260063 1.3064e-08 au
   Orbit Determination Parameters
   # obs. used (total)      263  
   data-arc span      10334 days (28.29 yr)  
   first obs. used      1991-10-08  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6248  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 07:26:12  

Additional Information
 Earth MOID = .751384 au 
 Jupiter MOID = 2.55247 au 
 T_jup = 3.592 
[ 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 17.5   n/a MPO470491  

233971 (1991 TD2)          Discovered 1991-Oct-08 by Spacewatch at Kitt Peak
Reference: 20100330/Numbers.arcLast Updated: 2010-04-05

Alternate Designations
 1991 TD2 = 2001 SJ219 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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