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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003624227356458 2.9124e-08  
a 2.316314920863404 7.3605e-09 au
q 2.083843943586827 6.5199e-08 au
i 1.862475021834575 3.1601e-06 deg
node 31.0344994756723 0.00011287 deg
peri 194.3854563982127 0.00011458 deg
M 114.8884652587322 1.9559e-05 deg
tp 2458789.569136095337
(2019-Nov-02.06913610)
7.0017e-05 TDB
period 1287.641110641738
3.53
6.1376e-06
1.68e-08
d
yr
n .2795810082675772 1.3326e-09 deg/d
Q 2.548785898139981 8.0993e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1454  
   data-arc span      10862 days (29.74 yr)  
   first obs. used      1991-03-09  
   last obs. used      2020-12-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5185  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:21  

Additional Information
 Earth MOID = 1.07327 au 
 Jupiter MOID = 2.42597 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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