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120378 (2005 QL9)
Classification: Main-belt Asteroid          SPK-ID: 2120378
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1939338467308434 5.0083e-08  
a 2.662980725711599 1.4315e-08 au
q 2.146538629804256 1.3382e-07 au
i 6.44312210406811 5.6921e-06 deg
node 12.48682617654299 3.6368e-05 deg
peri 327.0050857001901 3.807e-05 deg
M 192.8685582617427 1.2361e-05 deg
tp 2459937.395866313829
(2022-Dec-23.89586631)
5.7273e-05 TDB
period 1587.268733602109
4.35
1.2799e-05
3.504e-08
d
yr
n .2268046943651595 1.8288e-09 deg/d
Q 3.179422821618943 1.7091e-08 au
  Orbit Determination Parameters
   # obs. used (total)      390  
   data-arc span      9514 days (26.05 yr)  
   first obs. used      1995-03-29  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:03:37  

Additional Information
 Earth MOID = 1.13981 au 
 Jupiter MOID = 2.23215 au 
 T_jup = 3.349 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457435.5 (2016-Feb-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1946990589455561 5.0376e-08  
q 2.144809125844284 1.3467e-07 au
tp 2456758.197494036284
(2014-Apr-10.69749404)
4.8576e-05 TDB
node 12.53629848400193 3.6368e-05 deg
peri 326.2974347684308 3.8041e-05 deg
i 6.446412245159217 5.6907e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      390  
   data-arc span      9514 days (26.05 yr)  
   first obs. used      1995-03-29  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:03:37  

Additional Information
 Jupiter MOID = 2.23215 au 
 T_jup = 3.349 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.537752422782446E-15 -6.759495845252899E-15 7.861866744135309E-13 -6.911040796193632E-15 1.326669560390923E-13 2.960825280755677E-16
q -6.759495845252899E-15 1.813730701294636E-14 -2.033718477646619E-12 1.827141910846479E-14 -3.27504799439443E-13 -9.029736615851749E-16
tp 7.861866744135309E-13 -2.033718477646619E-12 2.359581493192473E-9 -4.006228089925689E-12 5.50658758701356E-10 -1.420932350820226E-12
node -6.911040796193632E-15 1.827141910846479E-14 -4.006228089925689E-12 1.3226490995977E-9 -1.314705594017004E-9 -1.602893017041989E-11
peri 1.326669560390923E-13 -3.27504799439443E-13 5.50658758701356E-10 -1.314705594017004E-9 1.447124591559877E-9 1.556145083987335E-11
i 2.960825280755677E-16 -9.029736615851749E-16 -1.420932350820226E-12 -1.602893017041989E-11 1.556145083987335E-11 3.238456073543476E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.43   n/a MPCxxxxx  

120378 (2005 QL9)          Discovered 2005-Aug-25 by NEAT at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 2005 QL9 = 1995 FB18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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