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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1816831933566135 3.0031e-08  
a 3.104270838251321 1.3343e-08 au
q 2.540276999314009 9.4068e-08 au
i 4.109450092490734 3.7256e-06 deg
node 118.3922081850415 5.6129e-05 deg
peri 305.629526801098 5.7585e-05 deg
M 65.68688890336064 1.1708e-05 deg
tp 2458635.986156280212
(2019-Jun-01.48615628)
6.463e-05 TDB
period 1997.734798068813
5.47
1.288e-05
3.526e-08
d
yr
n .1802040993369129 1.1619e-09 deg/d
Q 3.668264677188632 1.5767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2085  
   data-arc span      18427 days (50.45 yr)  
   first obs. used      1969-11-15  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49862  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:29:47  

Additional Information
 Earth MOID = 1.5565 au 
 Jupiter MOID = 1.66346 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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