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187978 (2001 QT218)
Classification: Main-belt Asteroid          SPK-ID: 2187978
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423132835105621 5.1728e-08  
a 2.449942160904205 1.1561e-08 au
q 2.101282847574966 1.3124e-07 au
i 15.04443984695854 5.0479e-06 deg
node 159.0964812126008 1.5574e-05 deg
peri 200.753349715982 2.2062e-05 deg
M 356.9823668547209 1.6373e-05 deg
tp 2459212.240757410571
(2020-Dec-28.74075741)
6.3718e-05 TDB
period 1400.658219312707
3.83
9.9141e-06
2.714e-08
d
yr
n .2570220165320912 1.8192e-09 deg/d
Q 2.798601474233444 1.3206e-08 au
  Orbit Determination Parameters
   # obs. used (total)      337  
   data-arc span      8500 days (23.27 yr)  
   first obs. used      1997-07-13  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:45:32  

Additional Information
 Earth MOID = 1.0999 au 
 Jupiter MOID = 2.6461 au 
 T_jup = 3.436 
[ 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 16.57   n/a E2021B55  

187978 (2001 QT218)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

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