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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805978575329503 5.7194e-08  
a 3.107550344142034 2.3956e-08 AU
q 2.546333409814201 1.824e-07 AU
i 4.10983688937969 5.6155e-06 deg
node 118.4250187398314 8.8121e-05 deg
peri 306.375632748899 8.9886e-05 deg
M 64.43988472846115 1.5632e-05 deg
tp 2456642.339291262320
(2013-Dec-15.83929126)
8.6581e-05 JED
period 2000.901393428732
5.48
2.3138e-05
6.335e-08
d
yr
n .1799189111378978 2.0805e-09 deg/d
Q 3.668767278469868 2.8283e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1015  
   data-arc span      16511 days (45.20 yr)  
   first obs. used      1969-11-15  
   last obs. used      2015-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56995  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:31:20  

Additional Information
 Earth MOID = 1.56224 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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