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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383535364257003 4.2018e-08  
a 2.97334669888213 1.56e-08 au
q 2.561973668072105 1.2671e-07 au
i 14.27624209456232 4.9036e-06 deg
node 145.2210944033582 1.7408e-05 deg
peri 175.0763203143553 2.5418e-05 deg
M 72.639448134726 1.7194e-05 deg
tp 2458622.634892989062
(2019-May-19.13489299)
8.9863e-05 TDB
period 1872.6937224473
5.13
1.4738e-05
4.035e-08
d
yr
n .1922364536628764 1.5128e-09 deg/d
Q 3.384719729692154 1.7758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1891  
   data-arc span      11492 days (31.46 yr)  
   first obs. used      1988-08-16  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47593  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:10:40  

Additional Information
 Earth MOID = 1.54967 au 
 Jupiter MOID = 1.96398 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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