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359280 (2009 HW7)
Classification: Main-belt Asteroid          SPK-ID: 2359280
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06353968709635106 6.9607e-08  
a 2.639454068471685 2.8094e-08 au
q 2.471743982855803 1.8814e-07 au
i 15.92343337153768 7.7017e-06 deg
node 192.7609416191652 1.6562e-05 deg
peri 1.259976353551639 4.5878e-05 deg
M 230.5462743258161 4.7499e-05 deg
tp 2459563.724636382072
(2021-Dec-15.22463638)
0.0002118 TDB
period 1566.280677064988
4.29
2.5007e-05
6.847e-08
d
yr
n .2298438621324209 3.6697e-09 deg/d
Q 2.807164154087567 2.9879e-08 au
  Orbit Determination Parameters
   # obs. used (total)      189  
   data-arc span      6613 days (18.11 yr)  
   first obs. used      2002-10-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:01:27  

Additional Information
 Earth MOID = 1.47112 au 
 Jupiter MOID = 2.14814 au 
 T_jup = 3.338 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457620.5 (2016-Aug-20.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06344924315750877 6.9742e-08  
q 2.471371601211019 1.8826e-07 au
tp 2458002.549457402017
(2017-Sep-06.04945740)
0.00019895 TDB
node 192.7848472240431 1.6548e-05 deg
peri 2.44389315049023 4.5981e-05 deg
i 15.93087590774487 7.7056e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      189  
   data-arc span      6613 days (18.11 yr)  
   first obs. used      2002-10-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:01:27  

Additional Information
 Jupiter MOID = 2.14814 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.864004654651854E-15 -1.300230313003606E-14 -2.148141889342157E-12 -3.40444662756819E-14 -3.56744943471665E-13 -5.163136525046314E-15
q -1.300230313003606E-14 3.544152850583334E-14 8.260541670867209E-12 9.020999459380071E-14 1.46636177212848E-12 1.625497626579582E-14
tp -2.148141889342157E-12 8.260541670867209E-12 3.958134989896066E-8 2.592647686582379E-11 8.53906821540159E-9 4.653092338266938E-12
node -3.40444662756819E-14 9.020999459380071E-14 2.592647686582379E-11 2.738335430212867E-10 -2.575761773398559E-10 1.091596370312521E-11
peri -3.56744943471665E-13 1.46636177212848E-12 8.53906821540159E-9 -2.575761773398559E-10 2.114259881684503E-9 -9.65878050994489E-12
i -5.163136525046314E-15 1.625497626579582E-14 4.653092338266938E-12 1.091596370312521E-11 -9.65878050994489E-12 5.937567961619265E-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 16.4   n/a MPO455593  

359280 (2009 HW7)          Discovered 2009-Apr-17 by Spacewatch at Kitt Peak
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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