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JPL Small-Body Database Browser
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393366 (1999 TM21)
Classification: Main-belt Asteroid          SPK-ID: 2393366
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04389606133867083 7.8931e-08  
a 2.601623280968757 4.322e-08 au
q 2.487422265847238 2.1731e-07 au
i 14.93703363807053 1.2635e-05 deg
node 1.653355951130636 2.5025e-05 deg
peri 98.17474490488054 0.00036653 deg
M 236.9974992853637 0.00034567 deg
tp 2459524.192654660885
(2021-Nov-05.69265466)
0.0014659 TDB
period 1532.727827341522
4.20
3.8195e-05
1.046e-07
d
yr
n .2348753598506859 5.8529e-09 deg/d
Q 2.715824296090275 4.5118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      6787 days (18.58 yr)  
   first obs. used      1999-10-09  
   last obs. used      2018-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63772  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:00:44  

Additional Information
 Earth MOID = 1.5492 au 
 Jupiter MOID = 2.33805 au 
 T_jup = 3.365 
[ 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 16.4   n/a MPO297784  

393366 (1999 TM21)          Discovered 1999-Oct-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-05-15

Alternate Designations
 1999 TM21 = 2014 EJ13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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