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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0856675591724847 3.4046e-08  
a 2.858882178998722 1.4589e-08 au
q 2.613968720762187 9.7819e-08 au
i 3.158084805579872 4.0425e-06 deg
node 105.9752078120546 8.4347e-05 deg
peri 352.0850330892885 8.9716e-05 deg
M 71.61497093897755 2.9631e-05 deg
tp 2458649.267954994922
(2019-Jun-14.76795499)
0.00014522 TDB
period 1765.602003938109
4.83
1.3515e-05
3.7e-08
d
yr
n .2038964609221294 1.5608e-09 deg/d
Q 3.103795637235256 1.5839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1197  
   data-arc span      10683 days (29.25 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52331  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:02  

Additional Information
 Earth MOID = 1.63087 au 
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457113.5 (2015-Apr-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08615601715224319 3.4251e-08  
q 2.614648918362347 9.8821e-08 au
tp 2456889.275413328541
(2014-Aug-19.77541333)
0.00014403 TDB
node 106.0055903245209 8.4299e-05 deg
peri 353.354958426019 8.9549e-05 deg
i 3.158433696724545 4.0433e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1197  
   data-arc span      10683 days (29.25 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52331  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:02  

Additional Information
 Jupiter MOID = 2.01524 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.173105822517311E-15 -3.353596348113608E-15 7.497939024199074E-13 5.710551431432935E-15 1.425741064839251E-13 -4.568927062687365E-16
q -3.353596348113608E-15 9.765582515320918E-15 -2.334912941348482E-12 -1.562728198506331E-14 -4.462898058494818E-13 1.406555217748053E-15
tp 7.497939024199074E-13 -2.334912941348482E-12 2.074456099024001E-8 5.270490524901608E-11 4.382593945948959E-9 8.380393150505039E-13
node 5.710551431432935E-15 -1.562728198506331E-14 5.270490524901608E-11 7.106257805982011E-9 -7.083796389585857E-9 7.16866540414504E-11
peri 1.425741064839251E-13 -4.462898058494818E-13 4.382593945948959E-9 -7.083796389585857E-9 8.019041354836502E-9 -7.138487024719112E-11
i -4.568927062687365E-16 1.406555217748053E-15 8.380393150505039E-13 7.16866540414504E-11 -7.138487024719112E-11 1.634807219610534E-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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Alternate Designations
 1999 XT81 = 2001 FK75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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