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146440 (2001 QH284)
Classification: Main-belt Asteroid          SPK-ID: 2146440
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08633614684509712 4.8614e-08  
a 2.655999142582553 1.6658e-08 au
q 2.426690410588094 1.3011e-07 au
i 1.842431173971972 5.4496e-06 deg
node 182.8167197671335 0.00012435 deg
peri 145.6467234174222 0.00012723 deg
M 135.1494560995126 2.6695e-05 deg
tp 2458406.957086605589
(2018-Oct-15.45708661)
0.00011585 TDB
period 1581.030771331077
4.33
1.4874e-05
4.072e-08
d
yr
n .2276995530560827 2.1421e-09 deg/d
Q 2.885307874577012 1.8096e-08 au
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      6737 days (18.44 yr)  
   first obs. used      2001-08-18  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55884  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:37:26  

Additional Information
 Earth MOID = 1.41559 au 
 Jupiter MOID = 2.37475 au 
 T_jup = 3.382 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456965.5 (2014-Nov-04.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08800172070092684 4.8856e-08  
q 2.421369081877094 1.3098e-07 au
tp 2456822.341071954215
(2014-Jun-13.84107195)
0.00011046 TDB
node 182.8400939161658 0.00012445 deg
peri 144.7539474102574 0.0001272 deg
i 1.84022061423797 5.454e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      6737 days (18.44 yr)  
   first obs. used      2001-08-18  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55884  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:37:26  

Additional Information
 Jupiter MOID = 2.37475 au 
 T_jup = 3.382 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.386896719856006E-15 -6.356045967387021E-15 1.114675724013957E-12 -1.557069022170299E-14 2.225936107843732E-13 -1.022083599533154E-15
q -6.356045967387021E-15 1.715566715204633E-14 -2.785330652414838E-12 4.234868683657424E-14 -5.45612218832058E-13 2.823296010512363E-15
tp 1.114675724013957E-12 -2.785330652414838E-12 1.22019169615649E-8 6.055990627417825E-13 2.91609376569918E-9 -2.252568742334569E-12
node -1.557069022170299E-14 4.234868683657424E-14 6.055990627417825E-13 1.548784549003579E-8 -1.547885908874581E-8 -5.998501833029203E-11
peri 2.225936107843732E-13 -5.45612218832058E-13 2.91609376569918E-9 -1.547885908874581E-8 1.617934588572484E-8 5.94369551027558E-11
i -1.022083599533154E-15 2.823296010512363E-15 -2.252568742334569E-12 -5.998501833029203E-11 5.94369551027558E-11 2.974558547494608E-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 16.3   n/a MPO453929  

146440 (2001 QH284)          Discovered 2001-Aug-18 by NEAT at Palomar
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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