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4327 Ries (1982 KB1)
Classification: Main-belt Asteroid          SPK-ID: 2004327
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2254282705236546 3.6182e-08  
a 2.772331439636416 1.5322e-08 au
q 2.147369557880825 1.0526e-07 au
i 16.67462896152556 4.9462e-06 deg
node 55.75466449987209 1.3157e-05 deg
peri 276.6068250979731 1.7363e-05 deg
M 288.461187574963 1.3097e-05 deg
tp 2458935.546725382676
(2020-Mar-27.04672538)
6.2506e-05 TDB
period 1686.033316029024
4.62
1.3978e-05
3.827e-08
d
yr
n .2135189124541611 1.7701e-09 deg/d
Q 3.397293321392007 1.8776e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2137  
   data-arc span      13636 days (37.33 yr)  
   first obs. used      1982-05-16  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40589  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:45:40  

Additional Information
 Earth MOID = 1.21296 au 
 Jupiter MOID = 2.2641 au 
 T_jup = 3.239 
[ 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 11.7   n/a MPO435739  
diameter diameter 14.80 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 126.562 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.0970   0.019 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
SMASSII spectral type spec_B Sk   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4327 Ries (1982 KB1)          Discovered 1982-May-24 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 KB1 = 1951 WA2 = 1983 WM1 = 1983 XF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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