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20158 (1996 TD21)
Classification: Main-belt Asteroid          SPK-ID: 2020158
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1001573411597711 3.0123e-08  
a 2.317316285659079 7.4847e-09 au
q 2.085220047861229 6.7329e-08 au
i 1.862230655953375 3.2077e-06 deg
node 31.05904858181206 0.00011318 deg
peri 194.6209430987115 0.00011489 deg
M 58.7505287741308 1.9602e-05 deg
tp 2458790.225951460388
(2019-Nov-02.72595146)
7.0206e-05 TDB
period 1288.476189980986
3.53
6.2425e-06
1.709e-08
d
yr
n .2793998079276206 1.3537e-09 deg/d
Q 2.54941252345693 8.2344e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      10838 days (29.67 yr)  
   first obs. used      1991-03-09  
   last obs. used      2020-11-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:13:02  

Additional Information
 Earth MOID = 1.0758 au 
 Jupiter MOID = 2.42679 au 
 T_jup = 3.573 
[ 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 15.5   n/a MPO384927  

20158 (1996 TD21)          Discovered 1996-Oct-05 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 TD21 = 1991 EA8 = 1992 SZ6 = 1998 DD16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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