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JPL Small-Body Database Browser
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8932 Nagatomo (1997 AR4)
Classification: Main-belt Asteroid          SPK-ID: 2008932
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06751135873388835 3.4982e-08  
a 2.930918712254733 1.3645e-08 au
q 2.733048407651837 1.0191e-07 au
i 1.31664545100102 3.1896e-06 deg
node 216.2562966487078 0.00016732 deg
peri 274.4705190249715 0.00016917 deg
M 229.9846218094806 2.6575e-05 deg
tp 2459662.405988253616
0.00013723 TDB
period 1832.753625668238
n .1964257470060881 1.3717e-09 deg/d
Q 3.128789016857628 1.4566e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2423  
   data-arc span      11101 days (30.39 yr)  
   first obs. used      1989-07-29  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47859  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:07:17  

Additional Information
 Earth MOID = 1.74805 au 
 Jupiter MOID = 1.89647 au 
 T_jup = 3.273 
[ 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 12.9   n/a MPO435784  
diameter diameter 7.360 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.206   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8932 Nagatomo           Discovered 1997 Jan. 6 by T. Kobayashi at Oizumi.
Makoto Nagatomo (b. 1937) is a pioneer in the field of electric propulsion. Today's electric propulsion technology, applied to Japan's sample return mission Hayabusa, is inherited from his work in the new realm.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2004-03-31

[ show close-approach data ]
Alternate Designations
 1997 AR4 = 1975 VH4 = 1982 BB3 = 1990 TZ3 = 1995 WV26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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