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305972 (2009 HG76)
Classification: Main-belt Asteroid          SPK-ID: 2305972
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04910186430640252 7.9295e-08  
a 3.054163943300396 3.6924e-08 au
q 2.904198799786953 2.4444e-07 au
i 2.9139562017341 7.0683e-06 deg
node 94.24245993647374 0.0001473 deg
peri 146.9418508354347 0.00016139 deg
M 30.96666015345157 6.2786e-05 deg
tp 2459032.801641126598
(2020-Jul-02.30164113)
0.000341 TDB
period 1949.561525048597
5.34
3.5354e-05
9.679e-08
d
yr
n .1846569063733581 3.3486e-09 deg/d
Q 3.204129086813839 3.8737e-08 au
  Orbit Determination Parameters
   # obs. used (total)      139  
   data-arc span      9014 days (24.68 yr)  
   first obs. used      1995-10-20  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62423  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:09:52  

Additional Information
 Earth MOID = 1.89032 au 
 Jupiter MOID = 1.78528 au 
 T_jup = 3.232 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457899.5 (2017-May-26.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04799472435114287 7.9446e-08  
q 2.907383163183902 2.4496e-07 au
tp 2457077.909248181046
(2015-Feb-24.40924818)
0.00036012 TDB
node 94.24240514400316 0.00014731 deg
peri 145.777374274194 0.0001619 deg
i 2.913926654091691 7.0703e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      139  
   data-arc span      9014 days (24.68 yr)  
   first obs. used      1995-10-20  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62423  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:09:52  

Additional Information
 Jupiter MOID = 1.78528 au 
 T_jup = 3.232 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.311704447403542E-15 -1.925607294319686E-14 -4.915161035684419E-12 -3.68722801175721E-14 -7.825448962929521E-13 -1.609866173911418E-15
q -1.925607294319686E-14 6.000545883351135E-14 9.856748703691039E-12 1.152105473010175E-13 1.510104934016559E-12 5.127497389655865E-15
tp -4.915161035684419E-12 9.856748703691039E-12 1.29685197899097E-7 -5.327021088156258E-11 2.425332996033246E-8 6.264274448711094E-12
node -3.68722801175721E-14 1.152105473010175E-13 -5.327021088156258E-11 2.169966234736796E-8 -2.168217323008822E-8 -4.844893829688319E-10
peri -7.825448962929521E-13 1.510104934016559E-12 2.425332996033246E-8 -2.168217323008822E-8 2.621040047829104E-8 4.850697182832601E-10
i -1.609866173911418E-15 5.127497389655865E-15 6.264274448711094E-12 -4.844893829688319E-10 4.850697182832601E-10 4.998923006454056E-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 16.73   n/a E2021B25  

305972 (2009 HG76)          Discovered 2009-Apr-24 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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