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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1440552475369852 2.2069e-08  
a 2.180985723408175 4.7716e-09 au
q 1.866803285147979 4.8977e-08 au
i 4.352316289837152 7.8292e-07 deg
node 218.3767982968045 2.0683e-06 deg
peri 184.607970833502 5.0077e-06 deg
M 98.90788956748787 6.3292e-06 deg
tp 2458877.274143118133
(2020-Jan-28.77414312)
2.0346e-05 TDB
period 1176.461341823244
3.22
3.8609e-06
1.057e-08
d
yr
n .3060024050106763 1.0042e-09 deg/d
Q 2.49516816166837 5.459e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2571  
   data-arc span      32338 days (88.54 yr)  
   first obs. used      1932-09-08  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:39:52  

Additional Information
 Earth MOID = .87447 au 
 Jupiter MOID = 2.88174 au 
 T_jup = 3.663 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457049.5 (2015-Jan-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1444318691121228 2.2116e-08  
q 1.865550760997441 4.9069e-08 au
tp 2456523.336877164486
(2013-Aug-18.83687716)
1.9424e-05 TDB
node 218.4091374122692 2.0679e-06 deg
peri 184.2435449183353 4.9825e-06 deg
i 4.352786164629905 7.832e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2571  
   data-arc span      32338 days (88.54 yr)  
   first obs. used      1932-09-08  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:39:52  

Additional Information
 Jupiter MOID = 2.88174 au 
 T_jup = 3.663 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.890977785015778E-16 -1.081562420877709E-15 -1.517730365162973E-13 1.355910986370713E-14 -3.997524493323574E-14 4.757969805990579E-15
q -1.081562420877709E-15 2.407778484443375E-15 3.242330638348234E-13 -2.960855304329198E-14 8.727379456109008E-14 -1.037015909443673E-14
tp -1.517730365162973E-13 3.242330638348234E-13 3.772878885739251E-10 4.005640230424935E-13 8.727802693146191E-11 1.092092005969368E-12
node 1.355910986370713E-14 -2.960855304329198E-14 4.005640230424935E-13 4.276376074032117E-12 -3.9033473055119E-12 1.003307330582934E-12
peri -3.997524493323574E-14 8.727379456109008E-14 8.727802693146191E-11 -3.9033473055119E-12 2.482519220094683E-11 -6.916656271064587E-13
i 4.757969805990579E-15 -1.037015909443673E-14 1.092092005969368E-12 1.003307330582934E-12 -6.916656271064587E-13 6.134094192870896E-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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