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20954 (1158 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2020954
[ 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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1147016413170795 3.9743e-08  
a 3.057636364762234 1.8994e-08 au
q 2.706920455173217 1.171e-07 au
i 10.03698259259281 3.6074e-06 deg
node 259.4006137162441 2.4992e-05 deg
peri 325.5156767343877 3.0251e-05 deg
M 170.5673171781532 1.9002e-05 deg
tp 2458275.225705585293
(2018-Jun-05.72570559)		 0.00010091 TDB
period 1952.887291071016
5.35		 1.8197e-05
4.982e-08		 d
yr
n .184342435759601 1.7177e-09 deg/d
Q 3.408352274351251 2.1173e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      15857 days (43.41 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46767  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:14  

Additional Information
 Earth MOID = 1.70238 au 
 Jupiter MOID = 1.6503 au 
 T_jup = 3.201 
[ 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 13.43   n/a E2021B10  

20954 (1158 T-3)          Discovered 1977-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1158 T-3 = 1998 QJ86 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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