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33504 Rebrouwer (1999 GT20)
Classification: Main-belt Asteroid          SPK-ID: 2033504
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1695000633034032 3.302e-08  
a 2.373541167702086 6.4778e-09 au
q 1.971225789523349 7.801e-08 au
i 3.029090342090142 2.9594e-06 deg
node 122.2459003507423 7.0793e-05 deg
peri 107.495674262881 7.1647e-05 deg
M 10.44621398675862 9.2634e-06 deg
tp 2459357.743013907348
(2021-May-23.24301391)
3.4394e-05 TDB
period 1335.652803115139
3.66
5.4679e-06
1.497e-08
d
yr
n .2695311230286592 1.1034e-09 deg/d
Q 2.775856545880823 7.5758e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1369  
   data-arc span      9121 days (24.97 yr)  
   first obs. used      1996-08-14  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52612  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:14:03  

Additional Information
 Earth MOID = .963903 au 
 Jupiter MOID = 2.21268 au 
 T_jup = 3.522 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457555.5 (2016-Jun-16.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702198491774024 3.298e-08  
q 1.9692839623942 7.7951e-08 au
tp 2458021.710927407790
(2017-Sep-25.21092741)
3.5493e-05 TDB
node 122.2714861104921 7.0802e-05 deg
peri 107.4890260082323 7.1648e-05 deg
i 3.029081001649713 2.9596e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1369  
   data-arc span      9121 days (24.97 yr)  
   first obs. used      1996-08-14  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52612  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:14:03  

Additional Information
 Jupiter MOID = 2.21268 au 
 T_jup = 3.522 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.087680337865785E-15 -2.564781612321441E-15 -8.550792255848266E-14 -7.226619499989438E-15 2.853367722811667E-15 -2.033192369144068E-15
q -2.564781612321441E-15 6.076416113140343E-15 1.433455951088498E-13 1.833691721568126E-14 -2.826645263966857E-14 4.828975172856787E-15
tp -8.550792255848266E-14 1.433455951088498E-13 1.259748648821127E-9 -5.806397593976548E-12 4.026982216559051E-10 5.001705983245596E-13
node -7.226619499989438E-15 1.833691721568126E-14 -5.806397593976548E-12 5.012858187142747E-9 -5.007522682294586E-9 5.269211134655038E-12
peri 2.853367722811667E-15 -2.826645263966857E-14 4.026982216559051E-10 -5.007522682294586E-9 5.133507520788553E-9 -5.150846952137288E-12
i -2.033192369144068E-15 4.828975172856787E-15 5.001705983245596E-13 5.269211134655038E-12 -5.150846952137288E-12 8.759357758388375E-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 15.51   n/a MPO636553  
diameter diameter 1.631 km 0.348 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.271   0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

33504 Rebrouwer           Discovered 1999 Apr. 15 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rachel Elizabeth Brouwer (b. 2002) was awarded second place in the 2016 Intel International Science and Engineering Fair for her earth and environmental sciences project. She attends the Bedford Academy, Bedford, NS, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-05-29Last Updated: 2018-07-10

Alternate Designations
 1999 GT20 = 2000 SS264 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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