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20946 (2316 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2020946
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03575584068554 2.7936e-08  
a 2.212258751188005 5.8635e-09 au
q 2.133157579725335 6.1925e-08 au
i 2.826310334981758 3.776e-06 deg
node 178.9441770830381 5.96e-05 deg
peri 312.9732066100186 8.1286e-05 deg
M 7.190359409452854 5.4716e-05 deg
tp 2459176.495071992970
(2020-Nov-22.99507199)
0.00018266 TDB
period 1201.855650104221
3.29
4.7782e-06
1.308e-08
d
yr
n .2995368037490874 1.1909e-09 deg/d
Q 2.291359922650675 6.0731e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1359  
   data-arc span      17334 days (47.46 yr)  
   first obs. used      1973-09-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:08  

Additional Information
 Earth MOID = 1.14795 au 
 Jupiter MOID = 2.69648 au 
 T_jup = 3.654 
[ 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 15.49   n/a E2021B10  

20946 (2316 T-2)          Discovered 1973-Sep-29 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
 2316 T-2 = 1998 FM28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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