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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1832552921319899 4.9602e-08  
a 3.104346238030672 2.3318e-08 au
q 2.535458361301517 1.5059e-07 au
i 2.94485519728411 5.2341e-06 deg
node 208.1206724915047 9.4967e-05 deg
peri 343.3496852952538 9.5883e-05 deg
M 197.6202470916302 1.6866e-05 deg
tp 2460101.620838071480
(2023-Jun-06.12083807)
0.00010051 TDB
period 1997.807583121477
5.47
2.2509e-05
6.163e-08
d
yr
n .1801975340575681 2.0303e-09 deg/d
Q 3.673234114759827 2.7591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      8997 days (24.63 yr)  
   first obs. used      1996-04-18  
   last obs. used      2020-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55749  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:16  

Additional Information
 Earth MOID = 1.53499 au 
 Jupiter MOID = 1.28993 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457148.5 (2015-May-06.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819859707185099 4.99e-08  
q 2.541878080780287 1.5148e-07 au
tp 2458106.449160449569
(2017-Dec-18.94916045)
8.6281e-05 TDB
node 208.1453796013526 9.4901e-05 deg
peri 343.8732694818971 9.5818e-05 deg
i 2.943676529408414 5.2369e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      8997 days (24.63 yr)  
   first obs. used      1996-04-18  
   last obs. used      2020-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55749  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:16  

Additional Information
 Jupiter MOID = 1.28993 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.489961604640621E-15 -7.501640000918054E-15 1.513252300462788E-13 3.108268223133928E-15 -2.913720523521565E-14 4.293215342371374E-16
q -7.501640000918054E-15 2.294740127255689E-14 4.325171318935935E-13 -8.797140382537399E-15 1.952699580530224E-13 -8.293244064794579E-16
tp 1.513252300462788E-13 4.325171318935935E-13 7.44449009047208E-9 -3.308838355916157E-12 1.163273830430827E-9 7.384047594209071E-13
node 3.108268223133928E-15 -8.797140382537399E-15 -3.308838355916157E-12 9.006284287777461E-9 -8.994524416529512E-9 -1.076221174121879E-10
peri -2.913720523521565E-14 1.952699580530224E-13 1.163273830430827E-9 -8.994524416529512E-9 9.181111852664843E-9 1.075637771886321E-10
i 4.293215342371374E-16 -8.293244064794579E-16 7.384047594209071E-13 -1.076221174121879E-10 1.075637771886321E-10 2.742503225486079E-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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