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6138 (1991 JH1)
Classification: Main-belt Asteroid          SPK-ID: 2006138
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1927974264692463 4.2307e-08  
a 2.345198018548573 1.2203e-08 au
q 1.893049876011633 9.973e-08 au
i 2.66771045361236 5.2071e-06 deg
node 147.7116914088663 9.942e-05 deg
peri 84.22809416106669 0.00010078 deg
M 314.1081372446189 2.0017e-05 deg
tp 2457567.724878884803
(2016-Jun-28.22487888)
7.375e-05 JED
period 1311.800236120731
3.59
1.0239e-05
2.803e-08
d
yr
n .2744320286635988 2.142e-09 deg/d
Q 2.797346161085514 1.4556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1371  
   data-arc span      23687 days (64.85 yr)  
   first obs. used      1951-02-10  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50322  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:58:55  

Additional Information
 Earth MOID = .883842 au 
 Jupiter MOID = 2.19515 au 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO319161  
rotation period rot_per 5.4566 h n/a LCDB (Rev. 2015-December); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

6138 (1991 JH1)          Discovered 1991-May-14 by Otomo and Muramatsu at Kiyosato
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 JH1 = 1951 CQ = 1980 FG11 = 1987 DT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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