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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805978922802876 5.0373e-08  
a 3.107550331136319 2.1923e-08 AU
q 2.54633329117819 1.5747e-07 AU
i 4.109836153661031 5.1863e-06 deg
node 118.4250369448917 8.0878e-05 deg
peri 306.3756203962406 8.2637e-05 deg
M 64.43988321063098 1.5518e-05 deg
tp 2456642.339301946971
(2013-Dec-15.83930195)
8.5761e-05 JED
period 2000.901380867478
5.48
2.1174e-05
5.797e-08
d
yr
n .1799189122673924 1.9039e-09 deg/d
Q 3.668767371094448 2.5882e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1139  
   data-arc span      16593 days (45.43 yr)  
   first obs. used      1969-11-15  
   last obs. used      2015-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55345  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:10:58  

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 13.2 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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