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20407 (1998 QM20)
Classification: Main-belt Asteroid          SPK-ID: 2020407
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04173726723773913 1.8758e-08  
a 3.024320074601731 1.2304e-08 au
q 2.89809321943562 5.8967e-08 au
i 11.67434622136577 3.6941e-07 deg
node 169.1818027274439 2.4668e-06 deg
peri 334.4465921803435 1.3337e-05 deg
M 275.8376799953759 1.5006e-05 deg
tp 2459649.612614021376
(2022-Mar-11.11261402)
8.0018e-05 TDB
period 1921.05613341947
5.26
1.1724e-05
3.21e-08
d
yr
n .187396918672648 1.1436e-09 deg/d
Q 3.150546929767843 1.2818e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2547  
   data-arc span      10039 days (27.49 yr)  
   first obs. used      1993-09-14  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4713  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:19:48  

Additional Information
 Earth MOID = 1.91213 au 
 Jupiter MOID = 1.83408 au 
 T_jup = 3.212 
[ 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 12.81   n/a E2021B10  

20407 (1998 QM20)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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