Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1888179026499901 4.9557e-08  
a 2.670572213641952 1.7095e-08 au
q 2.166320369386737 1.363e-07 au
i 14.05224722455303 5.8938e-06 deg
node 68.00250518179909 1.8358e-05 deg
peri 299.0935148446806 2.3125e-05 deg
M 350.0486795589979 1.8058e-05 deg
tp 2459440.563919608050
(2021-Aug-14.06391961)
8.0202e-05 TDB
period 1594.060924170236
4.36
1.5306e-05
4.191e-08
d
yr
n .2258382942216543 2.1685e-09 deg/d
Q 3.174824057897166 2.0323e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1094  
   data-arc span      9070 days (24.83 yr)  
   first obs. used      1995-11-16  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:42:04  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 01:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin