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91826 (1999 TP281)
Classification: Outer Main-belt Asteroid          SPK-ID: 2091826
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07383627389859512 4.2791e-08  
a 3.204231031331243 2.4433e-08 au
q 2.967642551267491 1.3321e-07 au
i 15.48997831585638 4.6176e-06 deg
node 108.7362920714529 1.6111e-05 deg
peri 338.953739140122 3.3961e-05 deg
M 163.7267152487541 3.2538e-05 deg
tp 2458047.701185620707
(2017-Oct-21.20118562)
0.00018455 TDB
period 2095.000639665954
5.74
2.3963e-05
6.561e-08
d
yr
n .1718376563633898 1.9655e-09 deg/d
Q 3.440819511394995 2.6237e-08 au
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      7582 days (20.76 yr)  
   first obs. used      1999-09-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54223  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:41:47  

Additional Information
 Earth MOID = 1.98903 au 
 Jupiter MOID = 1.73211 au 
 T_jup = 3.132 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456803.5 (2014-May-26.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07611745560416956 4.2864e-08  
q 2.958493089618768 1.3394e-07 au
tp 2455953.374828993002
(2012-Jan-26.87482899)
0.0001706 TDB
node 108.7622143799242 1.612e-05 deg
peri 338.6527540782761 3.3149e-05 deg
i 15.48922747512084 4.6179e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      7582 days (20.76 yr)  
   first obs. used      1999-09-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54223  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:41:47  

Additional Information
 Jupiter MOID = 1.73211 au 
 T_jup = 3.132 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.837362289805199E-15 -5.66075794816756E-15 -2.535030084582199E-13 -1.916852637734687E-15 -3.476824562516883E-14 2.284027823724825E-15
q -5.66075794816756E-15 1.794039560673135E-14 1.936981754887506E-12 8.390278312651036E-15 3.30500092545066E-13 -5.902735885856177E-15
tp -2.535030084582199E-13 1.936981754887506E-12 2.910277134226406E-8 -3.322164820962399E-12 4.964927672623853E-9 -3.770440874150273E-12
node -1.916852637734687E-15 8.390278312651036E-15 -3.322164820962399E-12 2.598498453106431E-10 -2.504482354265561E-10 -1.496665694480272E-11
peri -3.476824562516883E-14 3.30500092545066E-13 4.964927672623853E-9 -2.504482354265561E-10 1.098833198839258E-9 1.387447337400858E-11
i 2.284027823724825E-15 -5.902735885856177E-15 -3.770440874150273E-12 -1.496665694480272E-11 1.387447337400858E-11 2.132466326762404E-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 13.9   n/a MPO474797  
diameter diameter 8.853 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.098   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91826 (1999 TP281)          Discovered 1999-Oct-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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