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18453 Nishiyamayukio (1994 TT)
Classification: Main-belt Asteroid          SPK-ID: 2018453
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2363906164572707 3.4476e-08  
a 2.544679012483884 9.4324e-09 au
q 1.943140772036939 8.9824e-08 au
i 5.928558521682156 5.4529e-06 deg
node 358.1898324699637 3.8815e-05 deg
peri 34.04369369881227 4.1859e-05 deg
M 7.627375431430046 1.6756e-05 deg
tp 2458569.086193695962
(2019-Mar-26.58619370)
6.8901e-05 TDB
period 1482.681739101634
4.06
8.2438e-06
2.257e-08
d
yr
n .2428032871154981 1.35e-09 deg/d
Q 3.146217252930827 1.1662e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1719  
   data-arc span      23635 days (64.71 yr)  
   first obs. used      1955-03-23  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49545  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:28:26  

Additional Information
 Earth MOID = .95128 au 
 Jupiter MOID = 2.31933 au 
 T_jup = 3.397 
[ 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 14.5   n/a MPO449086  
diameter diameter 3.711 km 0.343 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.244   0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18453 Nishiyamayukio           Discovered 1994 Oct. 2 by K. Endate and K. Watanabe at Kitami.
Yukio Nishiyama (b. 1950) is the president of a ship-building design company who spends his evenings as an amateur astronomer. The private observatory he built in 1989 houses a 0.31-m telescope and a 0.25-m astrocamera.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

[ show close-approach data ]
Alternate Designations
 1994 TT = 1990 TU15 = 1998 RY68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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