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100431 (1996 HU20)
Classification: Main-belt Asteroid          SPK-ID: 2100431
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1833218526870704 5.0257e-08  
a 3.104178617489962 2.3842e-08 au
q 2.535114842260114 1.5208e-07 au
i 2.94500389557788 5.2363e-06 deg
node 208.1194768601308 0.00010546 deg
peri 343.4004766302691 0.00010637 deg
M 161.5081977051959 1.6786e-05 deg
tp 2458104.288419374757
(2017-Dec-16.78841937)
8.7484e-05 TDB
period 1997.645776556815
5.47
2.3015e-05
6.301e-08
d
yr
n .180212129810373 2.0762e-09 deg/d
Q 3.673242392719811 2.8213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      8590 days (23.52 yr)  
   first obs. used      1996-04-18  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 11:53:33  

Additional Information
 Earth MOID = 1.53526 au 
 Jupiter MOID = 1.29098 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456887.5 (2014-Aug-18.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1816940940555108 5.0526e-08  
q 2.543386772072298 1.5294e-07 au
tp 2456105.281474961179
(2012-Jun-26.78147496)
7.9334e-05 TDB
node 208.153122370899 0.00010543 deg
peri 343.8576183371172 0.00010634 deg
i 2.942902130663479 5.2377e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      8590 days (23.52 yr)  
   first obs. used      1996-04-18  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 11:53:33  

Additional Information
 Jupiter MOID = 1.29098 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.552863622810026E-15 -7.667811646561474E-15 -2.946974974104256E-13 5.336546077888945E-15 -6.925008001911307E-14 4.641658103385669E-16
q -7.667811646561474E-15 2.338925830721547E-14 1.300679116164759E-12 -1.44673658242068E-14 3.001532237551224E-13 -9.474816455971196E-16
tp -2.946974974104256E-13 1.300679116164759E-12 6.293821322500517E-9 -5.193956372218522E-12 1.14427225406965E-9 5.663836633824256E-14
node 5.336546077888945E-15 -1.44673658242068E-14 -5.193956372218522E-12 1.111525639747228E-8 -1.11006754755889E-8 -1.091191383685485E-10
peri -6.925008001911307E-14 3.001532237551224E-13 1.14427225406965E-9 -1.11006754755889E-8 1.130761605891616E-8 1.090359543933215E-10
i 4.641658103385669E-16 -9.474816455971196E-16 5.663836633824256E-14 -1.091191383685485E-10 1.090359543933215E-10 2.743388358424253E-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 14.9   n/a MPO449610  

100431 (1996 HU20)          Discovered 1996-Apr-18 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1996 HU20 = 1997 NM5 = 2001 DL45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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