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181843 (1998 TK20)
Classification: Main-belt Asteroid          SPK-ID: 2181843
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2009678077777362 5.3659e-08  
a 2.746810745260109 1.784e-08 au
q 2.194790211404855 1.4963e-07 au
i 2.225591175567976 6.2588e-06 deg
node 214.3305252735048 0.00013309 deg
peri 184.4405959690693 0.00013383 deg
M 309.1548670369743 1.6595e-05 deg
tp 2459435.348840298813
(2021-Aug-08.84884030)
7.8079e-05 TDB
period 1662.805810126485
4.55
1.6199e-05
4.435e-08
d
yr
n .2165015288060701 2.1092e-09 deg/d
Q 3.298831279115363 2.1425e-08 au
  Orbit Determination Parameters
   # obs. used (total)      341  
   data-arc span      9302 days (25.47 yr)  
   first obs. used      1994-12-28  
   last obs. used      2020-06-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57944  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:16  

Additional Information
 Earth MOID = 1.20148 au 
 Jupiter MOID = 2.12306 au 
 T_jup = 3.317 
[ 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 16.45   n/a E2021B55  

181843 (1998 TK20)          Discovered 1998-Oct-13 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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