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JPL Small-Body Database Browser
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11857 (1988 RK9)
Classification: Main-belt Asteroid          SPK-ID: 2011857
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383696138977737 4.2324e-08  
a 2.972959835149638 1.5839e-08 au
q 2.561592530626394 1.2784e-07 au
i 14.27642565851817 4.9577e-06 deg
node 145.2250377659039 1.7466e-05 deg
peri 174.9579018233022 2.5491e-05 deg
M 355.8291508002292 1.7327e-05 deg
tp 2458622.192218825598
(2019-May-18.69221883)
9.0092e-05 TDB
period 1872.32824856016
5.13
1.4963e-05
4.097e-08
d
yr
n .1922739777476752 1.5366e-09 deg/d
Q 3.384327139672882 1.8031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1821  
   data-arc span      11428 days (31.29 yr)  
   first obs. used      1988-08-16  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47708  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:20:03  

Additional Information
 Earth MOID = 1.54841 au 
 Jupiter MOID = 1.96117 au 
 T_jup = 3.201 
[ 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 12.9   n/a MPO502259  

11857 (1988 RK9)          Discovered 1988-Sep-01 by Debehogne, H. at La Silla
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 RK9 = 1993 OG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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