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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819469817831535 2.9819e-08  
a 3.102901896649458 1.2799e-08 au
q 2.538338261784867 9.2964e-08 au
i 4.109493088252425 3.2507e-06 deg
node 118.392000042443 5.5835e-05 deg
peri 305.4992895148674 5.6924e-05 deg
M 137.191993491607 1.0954e-05 deg
tp 2458635.689040252186
(2019-Jun-01.18904025)
5.9342e-05 TDB
period 1996.413482583944
5.47
1.2353e-05
3.382e-08
d
yr
n .1803233664471422 1.1157e-09 deg/d
Q 3.66746553151405 1.5128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2377  
   data-arc span      18864 days (51.65 yr)  
   first obs. used      1969-11-15  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49212  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:43:15  

Additional Information
 Earth MOID = 1.55424 au 
 Jupiter MOID = 1.66634 au 
 T_jup = 3.192 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.24   n/a MPO636235  
diameter diameter 10.794 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.096   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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Alternate Designations
 1998 AJ = 1969 VQ2 = 1980 VU2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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