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20536 Tracicarter (1999 RF81)
Classification: Main-belt Asteroid          SPK-ID: 2020536
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595735130020311 2.554e-08  
a 2.279187308851873 5.7157e-09 au
q 1.915489383188734 5.8591e-08 au
i 2.972528259823155 2.6302e-06 deg
node 127.1854103756426 7.5358e-05 deg
peri 148.0058094946217 7.6269e-05 deg
M 180.1502896492888 1.2127e-05 deg
tp 2460024.378621006171
(2023-Mar-20.87862101)
4.2949e-05 TDB
period 1256.806603254714
3.44
4.7277e-06
1.294e-08
d
yr
n .2864402518794211 1.0775e-09 deg/d
Q 2.642885234515011 6.6278e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1711  
   data-arc span      13522 days (37.02 yr)  
   first obs. used      1984-01-25  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50554  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:11:23  

Additional Information
 Earth MOID = .899732 au 
 Jupiter MOID = 2.46341 au 
 T_jup = 3.588 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457398.5 (2016-Jan-11.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159330777304033 2.5526e-08  
q 1.915839257352751 5.8534e-08 au
tp 2457511.276097771184
(2016-May-02.77609777)
4.1442e-05 TDB
node 127.2052500155269 7.5402e-05 deg
peri 148.0833833697374 7.6319e-05 deg
i 2.971721335257756 2.6294e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1711  
   data-arc span      13522 days (37.02 yr)  
   first obs. used      1984-01-25  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50554  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:11:23  

Additional Information
 Jupiter MOID = 2.46341 au 
 T_jup = 3.588 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.515784207038131E-16 -1.489075059110348E-15 -3.519568917358052E-13 8.899071237166797E-16 -9.640270211709174E-14 -1.850111466114388E-16
q -1.489075059110348E-15 3.426245140484778E-15 8.138292583993027E-13 -2.062563724063385E-15 2.223499955361634E-13 4.691519189734619E-16
tp -3.519568917358052E-13 8.138292583993027E-13 1.717423256599984E-9 -1.088249990675023E-11 5.069997462630505E-10 7.682768294149332E-13
node 8.899071237166797E-16 -2.062563724063385E-15 -1.088249990675023E-11 5.685526052457459E-9 -5.680858887021574E-9 1.165675470266195E-11
peri -9.640270211709174E-14 2.223499955361634E-13 5.069997462630505E-10 -5.680858887021574E-9 5.824617810833205E-9 -1.142770739559039E-11
i -1.850111466114388E-16 4.691519189734619E-16 7.682768294149332E-13 1.165675470266195E-11 -1.142770739559039E-11 6.913539120239476E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.25   n/a E2021B10  
rotation period rot_per 4.82 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

20536 Tracicarter           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Traci A. Carter mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. She teaches at the Providence Christian School, Cape Coral, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

Alternate Designations
 1999 RF81 = 1984 BC7 = 1998 DZ29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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