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118270 (1998 HN129)
Classification: Main-belt Asteroid          SPK-ID: 2118270
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620890559655938 5.6338e-08  
a 2.795092597928202 2.0103e-08 au
q 2.3420386773936 1.5613e-07 au
i 7.682181576298717 7.2962e-06 deg
node 205.6305344057474 3.3399e-05 deg
peri 327.9220370387378 3.8323e-05 deg
M 277.2728668155509 2.0226e-05 deg
tp 2459392.727645434063
(2021-Jun-27.22764543)
9.8332e-05 TDB
period 1706.839665789425
4.67
1.8414e-05
5.041e-08
d
yr
n .2109161201345162 2.2755e-09 deg/d
Q 3.248146518462804 2.3362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      8251 days (22.59 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:41  

Additional Information
 Earth MOID = 1.35055 au 
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457160.5 (2015-May-18.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1623747573464742 5.6636e-08  
q 2.3403214083063 1.5695e-07 au
tp 2457688.522918144276
(2016-Oct-27.02291814)
8.7917e-05 TDB
node 205.6438577679844 3.3408e-05 deg
peri 328.3725323740549 3.824e-05 deg
i 7.68138131356487 7.2968e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      8251 days (22.59 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:41  

Additional Information
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.207688785463689E-15 -8.839001529957102E-15 2.216351765327564E-12 -1.306903019951729E-14 4.951501397169909E-13 -2.909552207495853E-15
q -8.839001529957102E-15 2.463364337840007E-14 -5.549626974714203E-12 3.95114148787489E-14 -1.273635247456105E-12 1.012058540520392E-14
tp 2.216351765327564E-12 -5.549626974714203E-12 7.729481935370244E-9 -1.223860893008678E-11 1.643728418247655E-9 9.563380836139964E-13
node -1.306903019951729E-14 3.95114148787489E-14 -1.223860893008678E-11 1.116065991051476E-9 -1.108240092625181E-9 7.026075509743362E-12
peri 4.951501397169909E-13 -1.273635247456105E-12 1.643728418247655E-9 -1.108240092625181E-9 1.462298223601176E-9 -6.856516212278129E-12
i -2.909552207495853E-15 1.012058540520392E-14 9.563380836139964E-13 7.026075509743362E-12 -6.856516212278129E-12 5.324303586900278E-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 15.4   n/a MPO493675  

118270 (1998 HN129)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HN129 = 2003 JL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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