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120278 (2004 HL17)
Classification: Main-belt Asteroid          SPK-ID: 2120278
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593386599196901 4.5917e-08  
a 2.269682440264181 1.3952e-08 au
q 1.908034281789234 1.0256e-07 au
i 6.638663513111451 7.7081e-06 deg
node 24.5681718755181 4.2479e-05 deg
peri 227.2343760028375 4.8793e-05 deg
M 294.3473127302024 2.3515e-05 deg
tp 2459428.269768183768
(2021-Aug-01.76976818)
8.154e-05 TDB
period 1248.952936369414
3.42
1.1516e-05
3.153e-08
d
yr
n .2882414457077024 2.6577e-09 deg/d
Q 2.631330598739127 1.6175e-08 au
  Orbit Determination Parameters
   # obs. used (total)      242  
   data-arc span      8747 days (23.95 yr)  
   first obs. used      1997-04-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:05:43  

Additional Information
 Earth MOID = .900025 au 
 Jupiter MOID = 2.41489 au 
 T_jup = 3.588 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457269.5 (2015-Sep-04.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595728594896525 4.5817e-08  
q 1.907567566450131 1.0237e-07 au
tp 2456930.560066873609
(2014-Sep-30.06006687)
8.4843e-05 TDB
node 24.58821691846817 4.2463e-05 deg
peri 227.2701549366276 4.8787e-05 deg
i 6.640476254939028 7.7097e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      242  
   data-arc span      8747 days (23.95 yr)  
   first obs. used      1997-04-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:05:43  

Additional Information
 Jupiter MOID = 2.41489 au 
 T_jup = 3.588 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.099216363393335E-15 -4.661009416904561E-15 -1.679584391358489E-12 -2.598695245002001E-14 -4.632478384211654E-13 1.288868384707786E-15
q -4.661009416904561E-15 1.048050253236753E-14 3.536684710306778E-12 5.604497923463305E-14 9.837275166875349E-13 -2.482005016636928E-15
tp -1.679584391358489E-12 3.536684710306778E-12 7.198397393804559E-9 5.438054137652889E-11 2.054807174158265E-9 -1.036977869556216E-11
node -2.598695245002001E-14 5.604497923463305E-14 5.438054137652889E-11 1.803141279673129E-9 -1.774147855042045E-9 -1.065529805443613E-10
peri -4.632478384211654E-13 9.837275166875349E-13 2.054807174158265E-9 -1.774147855042045E-9 2.38016578707615E-9 1.029148899109517E-10
i 1.288868384707786E-15 -2.482005016636928E-15 -1.036977869556216E-11 -1.065529805443613E-10 1.029148899109517E-10 5.94399923686512E-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 17.0   n/a MPO453673  

120278 (2004 HL17)          Discovered 2004-Apr-16 by Siding Spring Survey at Siding Spring
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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