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13894 (2039 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2013894
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .053056019396186 4.2311e-08  
a 2.359102589320706 9.2431e-09 au
q 2.233937996584114 9.803e-08 au
i 6.590004396560698 4.5289e-06 deg
node 359.6357983141191 3.1886e-05 deg
peri 189.3231366550847 5.0384e-05 deg
M 133.4058676351787 3.7095e-05 deg
tp 2458510.054110785985
(2019-Jan-26.55411079)
0.00013695 TDB
period 1323.483916013953
3.62
7.7782e-06
2.13e-08
d
yr
n .2720093502036973 1.5986e-09 deg/d
Q 2.484267182057298 9.7335e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1930  
   data-arc span      16749 days (45.86 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48075  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:16:57  

Additional Information
 Earth MOID = 1.2348 au 
 Jupiter MOID = 2.47513 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456554.5 (2013-Sep-19.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05304689373868964 4.2209e-08  
q 2.233505627847034 9.7717e-08 au
tp 2457186.362794333100
(2015-Jun-12.86279433)
0.000139 TDB
node 359.7514680446501 3.1908e-05 deg
peri 189.3451041020738 5.0488e-05 deg
i 6.588492361942861 4.5274e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1930  
   data-arc span      16749 days (45.86 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48075  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:16:57  

Additional Information
 Jupiter MOID = 2.47513 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.78163506589123E-15 -4.109423254950194E-15 -5.74992499347399E-13 3.226495260942233E-16 -1.611618436198919E-13 -1.42116610197915E-15
q -4.109423254950194E-15 9.548576658786025E-15 1.043827358320341E-12 -1.104109329247713E-15 2.861738869001555E-13 3.541923547921289E-15
tp -5.74992499347399E-13 1.043827358320341E-12 1.932160252559347E-8 6.787278986493002E-12 5.448421970959891E-9 -1.445029615050246E-12
node 3.226495260942233E-16 -1.104109329247713E-15 6.787278986493002E-12 1.018105219101194E-9 -1.008847075150101E-9 3.41375804667345E-12
peri -1.611618436198919E-13 2.861738869001555E-13 5.448421970959891E-9 -1.008847075150101E-9 2.549055454249147E-9 -3.852217463420977E-12
i -1.42116610197915E-15 3.541923547921289E-15 -1.445029615050246E-12 3.41375804667345E-12 -3.852217463420977E-12 2.049704575699499E-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 14.1   n/a MPO473955  
rotation period rot_per 5.478 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

13894 (2039 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2039 T-2 = 1998 QY18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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