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79217 (1994 JR4)
Classification: Main-belt Asteroid          SPK-ID: 2079217
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1813461235564309 5.3319e-08  
a 2.358597361596861 7.9816e-09 au
q 1.930874873040844 1.279e-07 au
i 2.485918789767291 5.0298e-06 deg
node 204.4247986909905 0.00010446 deg
peri 151.2664848378644 0.00010498 deg
M 321.7469762681908 1.0607e-05 deg
tp 2459141.086108174271
(2020-Oct-18.58610817)
3.9167e-05 TDB
period 1323.058780857948
3.62
6.7159e-06
1.839e-08
d
yr
n .272096754285214 1.3812e-09 deg/d
Q 2.786319850152877 9.429e-09 au
  Orbit Determination Parameters
   # obs. used (total)      691  
   data-arc span      9588 days (26.25 yr)  
   first obs. used      1994-05-03  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51842  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:34:34  

Additional Information
 Earth MOID = .926866 au 
 Jupiter MOID = 2.65992 au 
 T_jup = 3.529 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO272999  
rotation period rot_per 5.138 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

79217 (1994 JR4)          Discovered 1994-May-03 by Spacewatch at Kitt Peak
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

Alternate Designations
 1994 JR4 = 2000 CJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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