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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819469817939056 2.9819e-08  
a 3.102901896636202 1.28e-08 au
q 2.53833826174066 9.2964e-08 au
i 4.109493076120235 3.2523e-06 deg
node 118.3919999706742 5.5838e-05 deg
peri 305.4992896292553 5.6928e-05 deg
M 137.1919934620824 1.0956e-05 deg
tp 2458635.689040420793
(2019-Jun-01.18904042)
5.9356e-05 TDB
period 1996.413482571151
5.47
1.2354e-05
3.382e-08
d
yr
n .1803233664482978 1.1158e-09 deg/d
Q 3.667465531531744 1.5129e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2373  
   data-arc span      18836 days (51.57 yr)  
   first obs. used      1969-11-15  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49245  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:30:28  

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 13.23   n/a E2021B10  
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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