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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2367356117351415 2.9477e-08  
a 2.544057854214758 8.482e-09 au
q 1.941788761807635 7.5538e-08 au
i 5.929832620558447 5.0253e-06 deg
node 358.1790520300098 3.6425e-05 deg
peri 33.98080624583028 3.9073e-05 deg
M 153.3724036218297 1.5119e-05 deg
tp 2458569.057768006599
(2019-Mar-26.55776801)
6.0435e-05 TDB
period 1482.138886459166
4.06
7.4123e-06
2.029e-08
d
yr
n .242892216977075 1.2147e-09 deg/d
Q 3.14632694662188 1.049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1949  
   data-arc span      24106 days (66.00 yr)  
   first obs. used      1955-03-23  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47308  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:39  

Additional Information
 Earth MOID = .94941 au 
 Jupiter MOID = 2.32294 au 
 T_jup = 3.397 
[ 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 14.55   n/a E2021B10  
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

Alternate Designations
 1994 TT = 1990 TU15 = 1998 RY68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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