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305945 (2009 HX16)
Classification: Main-belt Asteroid          SPK-ID: 2305945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1415848229130864 5.474e-08  
a 2.383241086975913 1.7808e-08 au
q 2.045810319717237 1.2405e-07 au
i 3.149367672717653 6.0807e-06 deg
node 148.3750956727283 8.6463e-05 deg
peri 327.3641819438573 9.111e-05 deg
M 181.5534710321043 2.8005e-05 deg
tp 2460062.625404670503
(2023-Apr-28.12540467)
0.00010922 TDB
period 1343.84875440488
3.68
1.5062e-05
4.124e-08
d
yr
n .2678872892652456 3.0025e-09 deg/d
Q 2.72067185423459 2.0329e-08 au
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      6011 days (16.46 yr)  
   first obs. used      2005-01-18  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60296  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 20:11:53  

Additional Information
 Earth MOID = 1.06335 au 
 Jupiter MOID = 2.36353 au 
 T_jup = 3.521 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457648.5 (2016-Sep-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1425058120821278 5.4936e-08  
q 2.043010366171228 1.2481e-07 au
tp 2457377.282822858712
(2015-Dec-20.78282286)
9.2078e-05 TDB
node 148.403566133731 8.6505e-05 deg
peri 327.569960012333 9.1046e-05 deg
i 3.148800997977014 6.0806e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      6011 days (16.46 yr)  
   first obs. used      2005-01-18  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60296  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 20:11:53  

Additional Information
 Jupiter MOID = 2.36353 au 
 T_jup = 3.521 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.017991361337401E-15 -6.816724897735475E-15 1.522174551880687E-12 -1.92410185721262E-14 4.351407237590382E-13 -3.107433376068237E-15
q -6.816724897735475E-15 1.557720475627715E-14 -3.082585584410295E-12 4.499252024188533E-14 -8.662984490386228E-13 7.243710966795278E-15
tp 1.522174551880687E-12 -3.082585584410295E-12 8.47830472129769E-9 2.461379932608782E-11 2.630227041687146E-9 -1.826052539133761E-12
node -1.92410185721262E-14 4.499252024188533E-14 2.461379932608782E-11 7.483101070998438E-9 -7.462656769587917E-9 4.889428076199726E-11
peri 4.351407237590382E-13 -8.662984490386228E-13 2.630227041687146E-9 -7.462656769587917E-9 8.289432004778751E-9 -4.930848610757325E-11
i -3.107433376068237E-15 7.243710966795278E-15 -1.826052539133761E-12 4.889428076199726E-11 -4.930848610757325E-11 3.697309739637726E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.73   n/a E2021B25  

305945 (2009 HX16)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

Alternate Designations
 2009 HX16 = 2005 CS16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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