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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 ]

[ 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 .2017059962964647 8.8299e-09  
a 2.248153501854282 4.9194e-09 au
q 1.794687459935378 2.0301e-08 au
i 9.133637273725753 7.865e-07 deg
node 42.13832248380744 5.7756e-06 deg
peri 317.6027980922498 6.5963e-06 deg
M 97.71299455356703 4.6165e-06 deg
tp 2459062.314816615409
(2020-Jul-31.81481662)
1.582e-05 TDB
period 1231.224839317555
3.37
4.0412e-06
1.106e-08
d
yr
n .2923917618487468 9.5971e-10 deg/d
Q 2.701619543773186 5.9117e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2495  
   data-arc span      13704 days (37.52 yr)  
   first obs. used      1983-11-08  
   last obs. used      2021-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:00:12  

Additional Information
 Earth MOID = .803728 au 
 Jupiter MOID = 2.77487 au 
 T_jup = 3.586 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457712.5 (2016-Nov-20.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2024441452135999 8.8142e-09  
q 1.792601507531668 2.0289e-08 au
tp 2457831.905133738241
(2017-Mar-19.40513374)
1.6515e-05 TDB
node 42.17006780832008 5.7706e-06 deg
peri 317.7121840377309 6.5854e-06 deg
i 9.139472610397688 7.8698e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2495  
   data-arc span      13704 days (37.52 yr)  
   first obs. used      1983-11-08  
   last obs. used      2021-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:00:12  

Additional Information
 Jupiter MOID = 2.77487 au 
 T_jup = 3.586 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.768999609187383E-17 -1.754306242840693E-16 -1.611485561842427E-14 -2.022496732688022E-14 1.671646207684835E-14 -9.631674248482211E-16
q -1.754306242840693E-16 4.116273311099212E-16 1.615014360812716E-14 4.538513472171822E-14 -4.379664540971791E-14 1.811668777146587E-15
tp -1.611485561842427E-14 1.615014360812716E-14 2.727428540160165E-10 4.293819484280334E-12 6.555275036848825E-11 2.773105732287546E-12
node -2.022496732688022E-14 4.538513472171822E-14 4.293819484280334E-12 3.330000181368071E-11 -2.889559666194833E-11 9.48934393064282E-13
peri 1.671646207684835E-14 -4.379664540971791E-14 6.555275036848825E-11 -2.889559666194833E-11 4.336767692295273E-11 -2.664035551250641E-13
i -9.631674248482211E-16 1.811668777146587E-15 2.773105732287546E-12 9.48934393064282E-13 -2.664035551250641E-13 6.193431200410316E-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 14.14   n/a MPCxxxxx  
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. 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:
[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

Alternate Designations
 1993 TV1 = 1983 VN = 1983 VP3 = 1999 JQ47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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