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21234 Nakashima (1995 WG)
Classification: Main-belt Asteroid          SPK-ID: 2021234
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1888179053046241 4.9484e-08  
a 2.670572211520417 1.6551e-08 au
q 2.166320360576394 1.359e-07 au
i 14.05224639503433 5.8458e-06 deg
node 68.00250545872869 1.8358e-05 deg
peri 299.0935140317705 2.2873e-05 deg
M 350.0486811665959 1.7257e-05 deg
tp 2459440.563912437184
(2021-Aug-14.06391244)
7.6632e-05 TDB
period 1594.060922270724
4.36
1.4819e-05
4.057e-08
d
yr
n .2258382944907674 2.0994e-09 deg/d
Q 3.174824062464439 1.9676e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1121  
   data-arc span      9397 days (25.73 yr)  
   first obs. used      1995-11-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49785  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:24  

Additional Information
 Earth MOID = 1.20495 au 
 Jupiter MOID = 2.39284 au 
 T_jup = 3.313 
[ 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 14.12   n/a E2021B10  
diameter diameter 4.065 km 0.792 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.323   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21234 Nakashima           Discovered 1995 Nov. 16 by T. Kobayashi at Oizumi.
Takashi Nakashima (b. 1956) is an amateur astronomer in Kumamoto prefecture. As a member of Kumamoto Civil Astronomical Observatory, he plays an active role in the popularization of astronomy amongst the public.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 WG = 1999 RP232 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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