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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457234.5 (2015-Jul-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1809490823845523 2.9663e-08  
q 2.542918124744746 9.2415e-08 au
tp 2456641.456765918119
(2013-Dec-14.95676592)
5.8039e-05 TDB
node 118.4162957549783 5.5814e-05 deg
peri 306.0828267601461 5.6919e-05 deg
i 4.109369470345421 3.2506e-06 deg
  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
 Jupiter MOID = 1.66634 au 
 T_jup = 3.192 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.798765707222843E-16 -2.723862021709286E-15 -4.546985170966474E-13 -3.533734840827785E-16 -1.113520660410384E-13 -7.679596881670797E-17
q -2.723862021709286E-15 8.540596814137776E-15 1.420839026116499E-12 7.189131508421696E-16 3.538014995746254E-13 3.970358257819094E-16
tp -4.546985170966474E-13 1.420839026116499E-12 3.3685301276391E-9 -5.836524637050667E-12 6.714721854992804E-10 -1.8717845681998E-13
node -3.533734840827785E-16 7.189131508421696E-16 -5.836524637050667E-12 3.115229839774189E-9 -3.108090175655839E-9 4.166478012866596E-11
peri -1.113520660410384E-13 3.538014995746254E-13 6.714721854992804E-10 -3.108090175655839E-9 3.239826542294095E-9 -4.157123191522395E-11
i -7.679596881670797E-17 3.970358257819094E-16 -1.8717845681998E-13 4.166478012866596E-11 -4.157123191522395E-11 1.056656154745693E-11

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

[ 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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