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5881 Akashi (1992 SR12)
Classification: Main-belt Asteroid          SPK-ID: 2005881
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08193046372058151 3.9152e-08  
a 2.854962777236219 1.2273e-08 au
q 2.621054352992257 1.1113e-07 au
i 2.684590886421016 4.206e-06 deg
node 48.5117889470453 8.5339e-05 deg
peri 337.7335754368557 8.8521e-05 deg
M 256.3436382211068 2.4944e-05 deg
tp 2459507.832358372049
0.00012332 TDB
period 1761.972404583539
n .2043164802487867 1.3174e-09 deg/d
Q 3.088871201480182 1.3278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2219  
   data-arc span      18864 days (51.65 yr)  
   first obs. used      1968-10-23  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48638  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:24:45  

Additional Information
 Earth MOID = 1.62541 au 
 Jupiter MOID = 2.30138 au 
 T_jup = 3.297 
[ 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 12.6   n/a MPO439120  
diameter diameter 8.796 km 0.407 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.250   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

5881 Akashi           Discovered 1992 Sept. 27 by M. Sugano and T. Nomura at Minami-Oda.
Named for a city facing the Setouchi Inland Sea. Akashi Municipal Planetarium was established in 1960 precisely on the meridian for Japan Standard Time ( 135\rm o east of Greenwich), and about 6.6 million people have visited it.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1992 SR12 = 1968 UN2 = 1978 WQ6 = 1982 PK = 1987 RE3 = 1987 SR22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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