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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805978839767756 5.0158e-08  
a 3.107550334380653 2.1849e-08 AU
q 2.546333319640186 1.5666e-07 AU
i 4.109836572707542 5.149e-06 deg
node 118.4250336559206 8.0732e-05 deg
peri 306.37562142 8.2483e-05 deg
M 64.4398842929087 1.5506e-05 deg
tp 2456642.339295370718
(2013-Dec-15.83929537)
8.5682e-05 JED
period 2000.901384000939
5.48
2.1102e-05
5.777e-08
d
yr
n .1799189119856349 1.8975e-09 deg/d
Q 3.66876734912112 2.5795e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      16651 days (45.59 yr)  
   first obs. used      1969-11-15  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55814  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:06:16  

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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