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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 197 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4412983164029095 3.5533e-08  
a 2.134503983477611 1.2954e-08 au
q 1.192550969213637 8.0473e-08 au
i 6.625417678183569 4.7449e-06 deg
node 51.11369716326057 2.9117e-05 deg
peri 287.2931584362939 2.9628e-05 deg
M 171.7628473983159 5.8424e-06 deg
tp 2458057.036211976584
(2017-Oct-30.53621198)
1.5036e-05 TDB
period 1139.052866506846
3.12
1.0369e-05
2.839e-08
d
yr
n .3160520556908115 2.877e-09 deg/d
Q 3.076456997741583 1.867e-08 au
  Orbit Determination Parameters
   # obs. used (total)      856  
   data-arc span      11812 days (32.34 yr)  
   first obs. used      1986-11-02  
   last obs. used      2019-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51742  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Mar-07 07:42:41  

Additional Information
 Earth MOID = .219241 au 
 Jupiter MOID = 2.35863 au 
 T_jup = 3.580 
[ 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-January); 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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