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6498 Ko (1992 UJ4)
Classification: Main-belt Asteroid          SPK-ID: 2006498
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1686295122307414 3.1138e-08  
a 2.280831175846772 6.4454e-09 au
q 1.896215727183063 7.1013e-08 au
i 7.991442690277751 3.6922e-06 deg
node 149.5996655601797 2.5949e-05 deg
peri 156.5817981476629 2.8194e-05 deg
M 75.46415494091875 1.159e-05 deg
tp 2458736.759788546710
(2019-Sep-10.25978855)
4.0312e-05 TDB
period 1258.166558646534
3.44
5.3332e-06
1.46e-08
d
yr
n .2861306378920675 1.2129e-09 deg/d
Q 2.665446624510482 7.5323e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2112  
   data-arc span      23788 days (65.13 yr)  
   first obs. used      1954-11-20  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45372  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:28:13  

Additional Information
 Earth MOID = .884557 au 
 Jupiter MOID = 2.59678 au 
 T_jup = 3.574 
[ 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 13.5   n/a MPO492828  
rotation period rot_per 500. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]

6498 Ko (1992 UJ4)          Discovered 1992-Oct-26 by Endate, K., Watanabe, K. at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1992 UJ4 = 1964 PM = 1971 QK3 = 1994 CD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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