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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04910186761640092 7.1499e-08  
a 3.054163946849529 3.639e-08 au
q 2.904198793052539 2.2359e-07 au
i 2.913960614823913 6.4265e-06 deg
node 94.24236289520614 0.00013219 deg
peri 146.9419462018814 0.00014662 deg
M 30.96666146260392 6.0499e-05 deg
tp 2459032.801633744636
(2020-Jul-02.30163374)
0.00032851 TDB
period 1949.561528446869
5.34
3.4843e-05
9.539e-08
d
yr
n .1846569060514834 3.3002e-09 deg/d
Q 3.20412910064652 3.8177e-08 au
  Orbit Determination Parameters
   # obs. used (total)      146  
   data-arc span      9014 days (24.68 yr)  
   first obs. used      1995-10-20  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62429  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:57:11  

Additional Information
 Earth MOID = 1.89032 au 
 Jupiter MOID = 1.78528 au 
 T_jup = 3.232 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457953.5 (2017-Jul-19.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04800405444249485 7.1501e-08  
q 2.907362577477045 2.2373e-07 au
tp 2457078.108900925448
(2015-Feb-24.60890093)
0.00034721 TDB
node 94.24130043652842 0.0001322 deg
peri 145.8124475839503 0.00014722 deg
i 2.913965743771536 6.4278e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      146  
   data-arc span      9014 days (24.68 yr)  
   first obs. used      1995-10-20  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62429  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:57:11  

Additional Information
 Jupiter MOID = 1.78528 au 
 T_jup = 3.232 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.112397184631696E-15 -1.580140478789899E-14 -1.619532176772596E-12 -2.922876628176796E-14 -1.61976399695974E-13 -1.297112266146979E-15
q -1.580140478789899E-14 5.00550427232393E-14 3.566494276876783E-13 9.351432999384841E-14 -2.791941366755767E-13 4.21102075061768E-15
tp -1.619532176772596E-12 3.566494276876783E-13 1.205529726090618E-7 -7.314781280757712E-11 2.253178447152962E-8 5.35902203520523E-12
node -2.922876628176796E-14 9.351432999384841E-14 -7.314781280757712E-11 1.747667919911288E-8 -1.746835204200451E-8 -2.931324374390447E-10
peri -1.61976399695974E-13 -2.791941366755767E-13 2.253178447152962E-8 -1.746835204200451E-8 2.167365064878652E-8 2.937837725898007E-10
i -1.297112266146979E-15 4.21102075061768E-15 5.35902203520523E-12 -2.931324374390447E-10 2.937837725898007E-10 4.131656822804458E-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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