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4288 Tokyotech (1989 TQ1)
Classification: Main-belt Asteroid          SPK-ID: 2004288
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766193619399916 6.1325e-09  
a 2.628944690917209 8.9528e-09 au
q 2.164622157031883 1.4171e-08 au
i 14.02454050496545 8.5231e-07 deg
node 44.567771029254 3.7692e-06 deg
peri 325.4360331758591 9.3605e-06 deg
M 165.0331129562877 6.4291e-06 deg
tp 2458682.761388392481
(2019-Jul-18.26138839)
2.6484e-05 TDB
period 1556.935426933164
4.26
7.9531e-06
2.177e-08
d
yr
n .2312234623044865 1.1811e-09 deg/d
Q 3.093267224802535 1.0534e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2823  
   data-arc span      22552 days (61.74 yr)  
   first obs. used      1959-09-30  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:04:25  

Additional Information
 Earth MOID = 1.17997 au 
 Jupiter MOID = 2.39936 au 
 T_jup = 3.337 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.70   n/a MPCxxxxx  
diameter diameter 12.296 km 0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.180 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:
[Koff, R.A. (2003) Minor Planet Bull. 30, 38-39.]
[Augusting, D.; Behrend, R.; Deldem, M.; Starkey, D.; et al. (2019) CBET 4705.]
geometric albedo albedo 0.223   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4288 Tokyotech           Discovered 1989 Oct. 8 by T. Kojima at Chiyoda.
Founded in 1881 as the Tokyo Vocational School, what is now the Tokyo Institute of Technology was made a degree-conferring university in 1929 and is the largest national institution of higher learning in Japan dedicated to science and technology.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25

Alternate Designations
 1989 TQ1 = 1951 XD1 = 1959 SJ = 1962 JG = 1980 NU = 1983 EQ3 = 1983 HA2 = A921 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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