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359284 (2009 HM20)
Classification: Main-belt Asteroid          SPK-ID: 2359284
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1322780108382446 5.5124e-08  
a 2.620644408222937 2.8383e-08 au
q 2.273990778788839 1.4267e-07 au
i 14.28746885726836 5.6154e-06 deg
node 76.85900658864783 2.0499e-05 deg
peri 124.0066054459165 2.7307e-05 deg
M 238.914544924857 2.2796e-05 deg
tp 2459521.694769397427
(2021-Nov-03.19476940)
0.00010323 TDB
period 1549.567756644549
4.24
2.5174e-05
6.892e-08
d
yr
n .2323228516186655 3.7743e-09 deg/d
Q 2.967298037657036 3.2137e-08 au
  Orbit Determination Parameters
   # obs. used (total)      258  
   data-arc span      4392 days (12.02 yr)  
   first obs. used      2007-12-20  
   last obs. used      2019-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52386  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 00:43:03  

Additional Information
 Earth MOID = 1.29985 au 
 Jupiter MOID = 2.09364 au 
 T_jup = 3.349 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457443.5 (2016-Feb-25.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1325673369762311 5.5234e-08  
q 2.272632626984334 1.4294e-07 au
tp 2457973.970196643878
(2017-Aug-08.47019664)
8.9207e-05 TDB
node 76.88120984677383 2.0516e-05 deg
peri 124.3668874338858 2.726e-05 deg
i 14.28321486014713 5.614e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      258  
   data-arc span      4392 days (12.02 yr)  
   first obs. used      2007-12-20  
   last obs. used      2019-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52386  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 00:43:03  

Additional Information
 Jupiter MOID = 2.09364 au 
 T_jup = 3.349 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.050767365066432E-15 -7.780103613061498E-15 4.796143723466598E-13 2.603511122429864E-14 1.216916508111404E-13 -2.909242755934563E-15
q -7.780103613061498E-15 2.043276183931304E-14 -2.904591044953484E-13 -6.575439886511784E-14 -1.648155892811651E-13 1.141566004723217E-14
tp 4.796143723466598E-13 -2.904591044953484E-13 7.957914912802203E-9 6.910713579559507E-12 1.625350048231763E-9 1.247011336938368E-11
node 2.603511122429864E-14 -6.575439886511784E-14 6.910713579559507E-12 4.208860604149063E-10 -4.057547400970177E-10 -4.393875099710712E-11
peri 1.216916508111404E-13 -1.648155892811651E-13 1.625350048231763E-9 -4.057547400970177E-10 7.431209538606562E-10 4.491234075774222E-11
i -2.909242755934563E-15 1.141566004723217E-14 1.247011336938368E-11 -4.393875099710712E-11 4.491234075774222E-11 3.151677241960414E-11

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 16.1   n/a MPO455593  

359284 (2009 HM20)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 2009 HM20 = 2011 UL369 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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