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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180081881164911 6.0605e-08  
a 3.107590087731561 2.39e-08 AU
q 2.547969418843431 1.9369e-07 AU
i 4.109744000492316 5.7049e-06 deg
node 118.4258590461693 9.1141e-05 deg
peri 306.5334233345208 9.2888e-05 deg
M 28.37270051190418 1.5654e-05 deg
tp 2456642.799819194387
(2013-Dec-16.29981919)
8.695e-05 JED
period 2000.939778932965
5.48
2.3083e-05
6.32e-08
d
yr
n .1799154596206669 2.0756e-09 deg/d
Q 3.667210756619692 2.8204e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      991  
   data-arc span      16199 days (44.35 yr)  
   first obs. used      1969-11-15  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5618  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 20:01:09  

Additional Information
 Earth MOID = 1.56329 AU 
 T_jup = 3.191 
[ 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 13.1 mag n/a MPO267751  

11157 (1998 AJ)          Discovered 1998-Jan-02 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905)
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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