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136923 (1998 JH2)
Classification: Amor [NEO]          SPK-ID: 2136923
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 228 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4415051037673655 3.5112e-08  
a 2.134492738769096 1.1796e-08 au
q 1.192103300648158 7.9719e-08 au
i 6.625636247512334 4.7025e-06 deg
node 51.10920268353818 2.5072e-05 deg
peri 287.286501795753 2.551e-05 deg
M 298.2252687094967 6.5748e-06 deg
tp 2459195.955913128147
(2020-Dec-12.45591313)
2.2175e-05 TDB
period 1139.04386560966
3.12
9.4423e-06
2.585e-08
d
yr
n .3160545531820358 2.62e-09 deg/d
Q 3.076882176890033 1.7004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      12288 days (33.64 yr)  
   first obs. used      1986-11-02  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5029  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-25 06:25:34  

Additional Information
 Earth MOID = .219577 au 
 Jupiter MOID = 2.36172 au 
 T_jup = 3.579 
[ show covariance matrix ]

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 16.2   n/a MPO436675  
rotation period rot_per 15.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]

136923 (1998 JH2)          Discovered 1998-May-01 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 JH2 = 1986 VH9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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