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2938 Hopi (1980 LB)
Classification: Main-belt Asteroid          SPK-ID: 2002938
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .328227939262101 4.1262e-08  
a 3.151376882608295 1.6618e-08 au
q 2.11700694259155 1.3422e-07 au
i 41.44069123906141 4.6013e-06 deg
node 108.8685288658633 7.0753e-06 deg
peri 263.4923148947059 9.1929e-06 deg
M 14.41324075431983 8.6317e-06 deg
tp 2458918.689681318070
(2020-Mar-10.18968132)
4.8672e-05 TDB
period 2043.379086460332
5.59
1.6163e-05
4.425e-08
d
yr
n .1761787631014735 1.3936e-09 deg/d
Q 4.185746822625039 2.2073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2540  
   data-arc span      14431 days (39.51 yr)  
   first obs. used      1980-06-11  
   last obs. used      2019-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:34:49  

Additional Information
 Earth MOID = 1.42157 au 
 Jupiter MOID = 2.18067 au 
 T_jup = 2.753 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456593.5 (2013-Oct-28.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3296398984770993 4.1228e-08  
q 2.112566311048705 1.3441e-07 au
tp 2456873.604339071113
(2014-Aug-04.10433907)
4.2129e-05 TDB
node 109.0864188662709 7.0826e-06 deg
peri 263.1496317906399 9.1666e-06 deg
i 41.43543700027104 4.6004e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2540  
   data-arc span      14431 days (39.51 yr)  
   first obs. used      1980-06-11  
   last obs. used      2019-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:34:49  

Additional Information
 Jupiter MOID = 2.18067 au 
 T_jup = 2.753 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.699785270761394E-15 -5.524309969534537E-15 -6.85428422578559E-14 -5.402617208973014E-15 1.694947785566415E-15 3.878050411786691E-15
q -5.524309969534537E-15 1.806685077648418E-14 3.307704612448211E-13 1.670313075066223E-14 5.421598936855275E-15 -1.210971261514616E-14
tp -6.85428422578559E-14 3.307704612448211E-13 1.774871744544311E-9 2.530479356047289E-12 2.829930498693577E-10 9.864231743854611E-13
node -5.402617208973014E-15 1.670313075066223E-14 2.530479356047289E-12 5.016298890208335E-11 -3.690216056738757E-11 -1.499893088233834E-12
peri 1.694947785566415E-15 5.421598936855275E-15 2.829930498693577E-10 -3.690216056738757E-11 8.402655406181422E-11 1.087288372764405E-12
i 3.878050411786691E-15 -1.210971261514616E-14 9.864231743854611E-13 -1.499893088233834E-12 1.087288372764405E-12 2.116375795918136E-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 11.6   n/a MPO452203  
diameter diameter 19.267 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.109   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2938 Hopi (1980 LB)          Discovered 1980-Jun-14 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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