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11157 (1998 AJ)
Classification: Main-belt Asteroid          SPK-ID: 2011157
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1813256628979103 4.9671e-08  
a 3.102932631156442 2.0988e-08 au
q 2.540291314884443 1.5457e-07 au
i 4.109407247310738 4.8639e-06 deg
node 118.4028577461858 7.9863e-05 deg
peri 305.9206276776471 8.1346e-05 deg
M 173.0223603070474 1.5058e-05 deg
tp 2456640.974152494785
(2013-Dec-14.47415249)
8.0917e-05 JED
period 1996.443144625208
5.47
2.0256e-05
5.546e-08
d
yr
n .1803206873029098 1.8295e-09 deg/d
Q 3.665573947428441 2.4794e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1231  
   data-arc span      16954 days (46.42 yr)  
   first obs. used      1969-11-15  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54986  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:11:00  

Additional Information
 Earth MOID = 1.5549 au 
 Jupiter MOID = 1.66897 au 
 T_jup = 3.192 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a MPO337352  

11157 (1998 AJ)          Discovered 1998-Jan-02 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 AJ = 1969 VQ2 = 1980 VU2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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