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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326495671276148 5.5419e-08  
a 2.619803030330734 2.9064e-08 au
q 2.272287292397749 1.4328e-07 au
i 14.28821967063235 5.721e-06 deg
node 76.85653608577219 2.0842e-05 deg
peri 124.0306335426336 2.7723e-05 deg
M 145.9437314751737 2.2147e-05 deg
tp 2457972.608892530902
(2017-Aug-07.10889253)
9.0369e-05 TDB
period 1548.821565709567
4.24
2.5774e-05
7.057e-08
d
yr
n .2324347800742766 3.868e-09 deg/d
Q 2.96731876826372 3.292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      4347 days (11.90 yr)  
   first obs. used      2007-12-20  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53956  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 23:25:08  

Additional Information
 Earth MOID = 1.29833 au 
 Jupiter MOID = 2.09427 au 
 T_jup = 3.349 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457341.5 (2015-Nov-15.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324768585914767 5.5507e-08  
q 2.273089384059697 1.4358e-07 au
tp 2457973.954329379996
(2017-Aug-08.45432938)
9.0351e-05 TDB
node 76.88239701288745 2.0857e-05 deg
peri 124.3409586805592 2.7722e-05 deg
i 14.28244652150248 5.7185e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      4347 days (11.90 yr)  
   first obs. used      2007-12-20  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53956  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 23:25:08  

Additional Information
 Jupiter MOID = 2.09427 au 
 T_jup = 3.349 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.081033319719352E-15 -7.848539751566172E-15 5.480093723091685E-13 2.690353966629132E-14 1.339539240644891E-13 -2.570264494291704E-15
q -7.848539751566172E-15 2.061474724881226E-14 -4.766351017400575E-13 -6.74067839021516E-14 -2.064097300488636E-13 1.080660490643042E-14
tp 5.480093723091685E-13 -4.766351017400575E-13 8.163358602910541E-9 9.704157687972799E-12 1.671471830420705E-9 1.321370053578851E-11
node 2.690353966629132E-14 -6.74067839021516E-14 9.704157687972799E-12 4.350171448867256E-10 -4.188627668793777E-10 -4.244362495789316E-11
peri 1.339539240644891E-13 -2.064097300488636E-13 1.671471830420705E-9 -4.188627668793777E-10 7.685316987674107E-10 4.359209270600941E-11
i -2.570264494291704E-15 1.080660490643042E-14 1.321370053578851E-11 -4.244362495789316E-11 4.359209270600941E-11 3.27015439504975E-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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