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4488 Tokitada (1987 UK)
Classification: Main-belt Asteroid          SPK-ID: 2004488
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1441931858850361 2.1036e-08  
a 2.180666355956887 4.6097e-09 au
q 1.866229126739151 4.6417e-08 au
i 4.352817439032627 7.8007e-07 deg
node 218.3719118373538 2.0599e-06 deg
peri 184.5751085107279 4.9803e-06 deg
M 158.925210670679 6.2705e-06 deg
tp 2458877.254720895542
(2020-Jan-28.75472090)
1.9995e-05 TDB
period 1176.202942810334
3.22
3.7296e-06
1.021e-08
d
yr
n .3060696304158549 9.705e-10 deg/d
Q 2.495103585174622 5.2744e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      32433 days (88.80 yr)  
   first obs. used      1932-09-08  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:13:15  

Additional Information
 Earth MOID = .874286 au 
 Jupiter MOID = 2.8829 au 
 T_jup = 3.664 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457231.5 (2015-Jul-28.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1443674851816916 2.1076e-08  
q 1.865819705070272 4.6498e-08 au
tp 2457699.317031694991
(2016-Nov-06.81703170)
1.9304e-05 TDB
node 218.4084579716681 2.0597e-06 deg
peri 184.213038665837 4.9622e-06 deg
i 4.352607572887002 7.8025e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      32433 days (88.80 yr)  
   first obs. used      1932-09-08  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:13:15  

Additional Information
 Jupiter MOID = 2.8829 au 
 T_jup = 3.664 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.442137297568671E-16 -9.765443143249142E-16 -1.484364871496703E-13 1.249531719349793E-14 -3.690202816780672E-14 4.433809696722561E-15
q -9.765443143249142E-16 2.162075144702464E-15 3.297858753574541E-13 -2.712665680151676E-14 8.009360339888052E-14 -9.61574414167323E-15
tp -1.484364871496703E-13 3.297858753574541E-13 3.726563952428228E-10 7.576554777110622E-13 8.624250650036517E-11 1.213267725419816E-12
node 1.249531719349793E-14 -2.712665680151676E-14 7.576554777110622E-13 4.242285589536792E-12 -3.824572574691988E-12 9.911021566840706E-13
peri -3.690202816780672E-14 8.009360339888052E-14 8.624250650036517E-11 -3.824572574691988E-12 2.462367596237303E-11 -6.664909266743643E-13
i 4.433809696722561E-15 -9.61574414167323E-15 1.213267725419816E-12 9.911021566840706E-13 -6.664909266743643E-13 6.087875667550461E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.79   n/a E2021B10  
diameter diameter 4.500 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 24.25 h n/a LCDB (Rev. 2020-October); 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:
[Durkee, R.I. (2018) Minor Planet Bull. 45, 333-335.]
geometric albedo albedo 0.317   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4488 Tokitada (1987 UK)          Discovered 1987-Oct-21 by Suzuki and Urata at Toyota
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 UK = 1932 RF = 1974 SV2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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