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JPL Small-Body Database Browser
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442437 (2011 US157)
Classification: Main-belt Asteroid          SPK-ID: 2442437
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2227247698035228 1.9766e-07  
a 2.630307729743161 7.4744e-08 au
q 2.044473046123689 5.7583e-07 au
i 2.367986556721897 5.0996e-06 deg
node 116.6023031538264 0.00016176 deg
peri 260.4278944095528 0.00016676 deg
M 294.9773157360203 2.2463e-05 deg
tp 2458881.930175824001
(2020-Feb-02.43017582)
9.8534e-05 TDB
period 1558.146429103439
4.27
6.6415e-05
1.818e-07
d
yr
n .2310437538320097 9.8481e-09 deg/d
Q 3.216142413362634 9.1391e-08 au
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      6285 days (17.21 yr)  
   first obs. used      2002-08-12  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53126  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 16:00:40  

Additional Information
 Earth MOID = 1.04694 au 
 Jupiter MOID = 2.24396 au 
 T_jup = 3.363 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457267.5 (2015-Sep-02.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2253078684090854 1.9796e-07  
q 2.036516951823176 5.7715e-07 au
tp 2457321.213504938253
(2015-Oct-25.71350494)
0.00010361 TDB
node 116.7461845397027 0.00016216 deg
peri 259.7944190265671 0.00016692 deg
i 2.366816078772811 5.098e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      6285 days (17.21 yr)  
   first obs. used      2002-08-12  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53126  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 16:00:40  

Additional Information
 Jupiter MOID = 2.24396 au 
 T_jup = 3.363 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.918698805494005E-14 -1.142055156486373E-13 9.505456050837416E-12 -1.731046773856605E-13 4.343876979509387E-12 -1.012883109718715E-13
q -1.142055156486373E-13 3.33103049812389E-13 -2.770796447811221E-11 5.054866684175943E-13 -1.266929940184746E-11 2.958271268408901E-13
tp 9.505456050837416E-12 -2.770796447811221E-11 1.073565968232432E-8 -2.421086128837116E-10 4.126375024693979E-9 -2.617139203255423E-11
node -1.731046773856605E-13 5.054866684175943E-13 -2.421086128837116E-10 2.629656131045414E-8 -2.635981756686409E-8 1.687761928670529E-10
peri 4.343876979509387E-12 -1.266929940184746E-11 4.126375024693979E-9 -2.635981756686409E-8 2.786275313987383E-8 -1.800063673719643E-10
i -1.012883109718715E-13 2.958271268408901E-13 -2.617139203255423E-11 1.687761928670529E-10 -1.800063673719643E-10 2.598943331981629E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.7   n/a MPO349189  

442437 (2011 US157)          Discovered 2007-Nov-05 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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