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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06353968904560763 7.0005e-08  
a 2.639454069411624 2.8293e-08 au
q 2.471743978591046 1.8887e-07 au
i 15.9234331173791 7.7788e-06 deg
node 192.7609416203858 1.6562e-05 deg
peri 1.259977097333114 4.5982e-05 deg
M 230.5462733221709 4.7662e-05 deg
tp 2459563.724641049567
(2021-Dec-15.22464105)
0.00021258 TDB
period 1566.280677901643
4.29
2.5184e-05
6.895e-08
d
yr
n .229843862009646 3.6956e-09 deg/d
Q 2.807164160232202 3.009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      185  
   data-arc span      6318 days (17.30 yr)  
   first obs. used      2002-10-09  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51655  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 00:43:03  

Additional Information
 Earth MOID = 1.47112 au 
 Jupiter MOID = 2.14814 au 
 T_jup = 3.338 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457609.5 (2016-Aug-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06344549527163691 7.0149e-08  
q 2.471392258610565 1.89e-07 au
tp 2458002.536403751524
(2017-Sep-06.03640375)
0.00019949 TDB
node 192.784876539128 1.6548e-05 deg
peri 2.439882745061128 4.6075e-05 deg
i 15.93087617128113 7.7827e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      185  
   data-arc span      6318 days (17.30 yr)  
   first obs. used      2002-10-09  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51655  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 00:43:03  

Additional Information
 Jupiter MOID = 2.14814 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.920873045819899E-15 -1.312851385360896E-14 -2.038582524463863E-12 -3.452745212887821E-14 -3.348139620543061E-13 -4.997124772759904E-15
q -1.312851385360896E-14 3.572152533468333E-14 8.017364750348436E-12 9.128257963088849E-14 1.417677168231054E-12 1.587169499032639E-14
tp -2.038582524463863E-12 8.017364750348436E-12 3.979635245838517E-8 2.495477915641317E-11 8.582195137121528E-9 4.019797615774102E-12
node -3.452745212887821E-14 9.128257963088849E-14 2.495477915641317E-11 2.738381908386979E-10 -2.577722406413532E-10 1.096208521158281E-11
peri -3.348139620543061E-13 1.417677168231054E-12 8.582195137121528E-9 -2.577722406413532E-10 2.122915291231885E-9 -9.853292962566301E-12
i -4.997124772759904E-15 1.587169499032639E-14 4.019797615774102E-12 1.096208521158281E-11 -9.853292962566301E-12 6.057050822771159E-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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