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JPL Small-Body Database Browser
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71044 (1999 XT81)
Classification: Main-belt Asteroid          SPK-ID: 2071044
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08566755767738402 3.6362e-08  
a 2.858882179552475 1.5656e-08 au
q 2.613968725542818 1.0634e-07 au
i 3.158083582739703 4.2819e-06 deg
node 105.9752223133635 8.616e-05 deg
peri 352.0850181390605 9.1473e-05 deg
M 71.61497118671781 2.985e-05 deg
tp 2458649.267953677844
(2019-Jun-14.76795368)
0.00014618 TDB
period 1765.602004451094
4.83
1.4503e-05
3.971e-08
d
yr
n .2038964608628886 1.6749e-09 deg/d
Q 3.103795633562132 1.6997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1057  
   data-arc span      10576 days (28.96 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53911  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:19:38  

Additional Information
 Earth MOID = 1.63087 au 
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456911.5 (2014-Sep-11.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08572371598533839 3.6672e-08  
q 2.615281967860154 1.0742e-07 au
tp 2456890.339539705442
(2014-Aug-20.83953971)
0.00014499 TDB
node 106.0125223161717 8.6055e-05 deg
peri 353.6160188803227 9.1285e-05 deg
i 3.159203156205851 4.2842e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1057  
   data-arc span      10576 days (28.96 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53911  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:19:38  

Additional Information
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.344840158767767E-15 -3.904714216851371E-15 6.00012956781631E-13 4.000989415208752E-15 1.247244076577935E-13 -4.032207596717679E-16
q -3.904714216851371E-15 1.153970909807465E-14 -1.865464028781764E-12 -1.044850986961294E-14 -3.907541373077288E-13 1.289816445242308E-15
tp 6.00012956781631E-13 -1.865464028781764E-12 2.102256535723596E-8 3.594213967518625E-11 4.447039862148431E-9 2.390320015373767E-12
node 4.000989415208752E-15 -1.044850986961294E-14 3.594213967518625E-11 7.405424868344736E-9 -7.386060568978955E-9 4.764095890888987E-11
peri 1.247244076577935E-13 -3.907541373077288E-13 4.447039862148431E-9 -7.386060568978955E-9 8.333010990865872E-9 -4.704921731706604E-11
i -4.032207596717679E-16 1.289816445242308E-15 2.390320015373767E-12 4.764095890888987E-11 -4.704921731706604E-11 1.835450817828857E-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 14.8   n/a MPO493362  
diameter diameter 3.276 km 0.489 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.217   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71044 (1999 XT81)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XT81 = 2001 FK75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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