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91023 Lutan (1998 DQ32)
Classification: Main-belt Asteroid          SPK-ID: 2091023
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2128911201976559 5.7161e-08  
a 2.586755099319795 1.9805e-08 au
q 2.036057908548605 1.5544e-07 au
i 9.732299633758959 5.644e-06 deg
node 348.7582626886366 2.2408e-05 deg
peri 347.467005282548 2.4312e-05 deg
M 327.5033547716636 1.0078e-05 deg
tp 2459137.672617585272
(2020-Oct-15.17261759)
4.3161e-05 TDB
period 1519.607392815971
4.16
1.7452e-05
4.778e-08
d
yr
n .2369032960104828 2.7208e-09 deg/d
Q 3.137452290090985 2.4022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      8150 days (22.31 yr)  
   first obs. used      1998-02-23  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52008  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:37:22  

Additional Information
 Earth MOID = 1.02817 au 
 Jupiter MOID = 2.25943 au 
 T_jup = 3.370 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457044.5 (2015-Jan-22.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2123941380135244 5.7156e-08  
q 2.03644848830718 1.5521e-07 au
tp 2457620.746241279203
(2016-Aug-20.24624128)
3.9507e-05 TDB
node 348.8093842383544 2.2408e-05 deg
peri 347.7993728959868 2.4312e-05 deg
i 9.732898923823925 5.6445e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      8150 days (22.31 yr)  
   first obs. used      1998-02-23  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52008  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:37:22  

Additional Information
 Jupiter MOID = 2.25943 au 
 T_jup = 3.370 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.266781404590876E-15 -8.835406330308708E-15 7.683639720808862E-13 -1.759478683351619E-14 2.183197206288521E-13 -3.589128988810147E-15
q -8.835406330308708E-15 2.409020805536778E-14 -1.985681996555081E-12 4.600447676051616E-14 -5.882680999773047E-13 1.034469311691202E-14
tp 7.683639720808862E-13 -1.985681996555081E-12 1.560802952786812E-9 -1.246870715921636E-11 3.805233880022014E-10 -2.786505440653164E-12
node -1.759478683351619E-14 4.600447676051616E-14 -1.246870715921636E-11 5.021111283356303E-10 -4.968014419300896E-10 1.931974612801216E-11
peri 2.183197206288521E-13 -5.882680999773047E-13 3.805233880022014E-10 -4.968014419300896E-10 5.910806467992848E-10 -1.970975356361497E-11
i -3.589128988810147E-15 1.034469311691202E-14 -2.786505440653164E-12 1.931974612801216E-11 -1.970975356361497E-11 3.186061665885388E-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 14.9   n/a MPO436408  
diameter diameter 4.763 km 0.570 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.085   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91023 Lutan           Discovered 1998 Feb. 23 by the Beijing Schmidt CCD Asteroid Program at Xinglong.
Lu Tan (b. 1932), an astrophysicist and academician of the Chinese Academy of Sciences, has made contributions in the fields of compact-star physics, cosmology and high-energy astrophysics, especially gamma-ray bursts and afterglow physics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111012/MPCPages.arcLast Updated: 2011-10-13

Alternate Designations
 1998 DQ32 = 2000 XG25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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