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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 ]

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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08566755674666439 3.413e-08  
a 2.858882179996275 1.4623e-08 au
q 2.613968728609416 9.8127e-08 au
i 3.158084743447509 4.0566e-06 deg
node 105.9752081456111 8.4362e-05 deg
peri 352.085032714954 8.9731e-05 deg
M 71.61497059677312 2.9633e-05 deg
tp 2458649.267956489413
(2019-Jun-14.76795649)
0.00014523 TDB
period 1765.602004862219
4.83
1.3546e-05
3.709e-08
d
yr
n .2038964608154107 1.5644e-09 deg/d
Q 3.103795631383134 1.5876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      10658 days (29.18 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52415  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:42:49  

Additional Information
 Earth MOID = 1.63087 au 
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457098.5 (2015-Mar-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08614799515536574 3.4344e-08  
q 2.614744083759134 9.9149e-08 au
tp 2456889.395284148706
(2014-Aug-19.89528415)
0.00014402 TDB
node 106.0066717881332 8.4308e-05 deg
peri 353.3840761600441 8.9558e-05 deg
i 3.158493373755983 4.0574e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      10658 days (29.18 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52415  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:42:49  

Additional Information
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.179495590332275E-15 -3.373934521815621E-15 7.492037907347116E-13 5.713323576739616E-15 1.428585348308805E-13 -4.552470591621187E-16
q -3.373934521815621E-15 9.830574247264734E-15 -2.33466656170972E-12 -1.55567711554461E-14 -4.475746869713451E-13 1.402440701044908E-15
tp 7.492037907347116E-13 -2.33466656170972E-12 2.07427893455241E-8 5.251050965949147E-11 4.382088217521716E-9 8.917685406393644E-13
node 5.713323576739616E-15 -1.55567711554461E-14 5.251050965949147E-11 7.107910959021662E-9 -7.085485418818102E-9 7.114476660737378E-11
peri 1.428585348308805E-13 -4.475746869713451E-13 4.382088217521716E-9 -7.085485418818102E-9 8.02057463234694E-9 -7.083232286676145E-11
i -4.552470591621187E-16 1.402440701044908E-15 8.917685406393644E-13 7.114476660737378E-11 -7.083232286676145E-11 1.646280496067618E-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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2000-Sep-02 14:32 < 00:01 Hebe 0.0374752880732705 0.0374736085017321 0.037476967687147 4.60584873151303 4.60584869549642 2451790.105449225 0.722149640501974 112.176180259449 45.3087031988352 46.686166962781 96289.0325569736 T 27 CATAB v2.0f-lin.ifort 2020-May-20 13:43:08 2020-May-20 13:43

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