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11878 Hanamiyama (1990 HJ)
Classification: Main-belt Asteroid          SPK-ID: 2011878
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1440881377363458 3.6127e-08  
a 2.393967668327209 8.2391e-09 au
q 2.049025325196919 8.6226e-08 au
i 3.904226354845298 4.1689e-06 deg
node 50.1473809000465 5.459e-05 deg
peri 112.4049044380511 5.6317e-05 deg
M 76.78291798447624 1.4009e-05 deg
tp 2458711.938783728939
5.2196e-05 TDB
period 1352.931623132435
n .2660888354183739 1.3737e-09 deg/d
Q 2.738910011457498 9.4263e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1905  
   data-arc span      18967 days (51.93 yr)  
   first obs. used      1968-05-22  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49803  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:37:51  

Additional Information
 Earth MOID = 1.06061 au 
 Jupiter MOID = 2.24032 au 
 T_jup = 3.513 
[ 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 14.3   n/a MPO431637  
diameter diameter 3.460 km 0.818 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.371   0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

11878 Hanamiyama           Discovered 1990 Apr. 18 by T. Seki at Geisei.
Hanamiyama Mountain in Fukushima city is famous for the production of flowering plants. In spring the mountain is completely covered with colorful flowers of cherry trees, peaches and golden bells attracting large numbers of tourists. The name was suggested by H. Ohno.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070601/MPCPages.arcLast Updated: 2007-06-06

Alternate Designations
 1990 HJ = 1953 GO1 = 1968 KH = 1997 AU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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