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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1816100900927491 3.4513e-08  
a 3.104540792903489 1.5002e-08 au
q 2.540724859807672 1.1078e-07 au
i 4.109102735039948 3.7401e-06 deg
node 118.3937155713027 6.6569e-05 deg
peri 305.714952694513 6.7866e-05 deg
M 353.5501903313674 1.271e-05 deg
tp 2458636.296361161923
(2019-Jun-01.79636116)
7.0614e-05 TDB
period 1997.995395269468
5.47
1.4482e-05
3.965e-08
d
yr
n .1801805954369815 1.306e-09 deg/d
Q 3.668356725999307 1.7727e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1787  
   data-arc span      18275 days (50.03 yr)  
   first obs. used      1969-11-15  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52786  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:32:13  

Additional Information
 Earth MOID = 1.55666 au 
 Jupiter MOID = 1.66265 au 
 T_jup = 3.191 
[ 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 13.2   n/a MPO337352  
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

[ show close-approach data ]
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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