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18418 Ujibe (1993 TV1)
Classification: Main-belt Asteroid          SPK-ID: 2018418
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2017102089180945 3.9041e-08  
a 2.247895913599909 5.3382e-09 au
q 1.79447235924154 8.7043e-08 au
i 9.134209913677527 4.3085e-06 deg
node 42.14403743082329 1.8666e-05 deg
peri 317.5276480617489 2.0615e-05 deg
M 341.9691622714085 8.4801e-06 deg
tp 2459062.156110984579
(2020-Jul-31.65611098)
2.904e-05 TDB
period 1231.013239016165
3.37
4.3851e-06
1.201e-08
d
yr
n .2924420214097086 1.0417e-09 deg/d
Q 2.701319467958277 6.415e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2088  
   data-arc span      13505 days (36.97 yr)  
   first obs. used      1983-11-08  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44372  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:07  

Additional Information
 Earth MOID = .804336 au 
 Jupiter MOID = 2.77361 au 
 T_jup = 3.586 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO474010  
diameter diameter 3.446 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.470 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.449   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18418 Ujibe           Discovered 1993 Oct. 15 by K. Endate and K. Watanabe at Kitami.
Tadashi Ujibe (b. 1943) is an amateur astronomer who constructed the three-meter dome of his own private observatory. His astrophotos capture solar prominences and the planets on a regular basis.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120831/MPCPages.arcLast Updated: 2012-09-04

[ show close-approach data ]
Alternate Designations
 1993 TV1 = 1983 VN = 1983 VP3 = 1999 JQ47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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