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8736 Shigehisa (1997 AD7)
Classification: Main-belt Asteroid          SPK-ID: 2008736
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2626541286269316 4.7334e-08  
a 2.477022474255632 1.1918e-08 AU
q 1.826422294690693 1.1675e-07 AU
i 2.784052559652268 4.9926e-06 deg
node 166.1455634176818 0.00010333 deg
peri 185.215174504588 0.00010405 deg
M 325.2816517950035 1.3288e-05 deg
tp 2457137.825092796526
(2015-Apr-25.32509280)
5.3224e-05 JED
period 1423.945434121616
3.90
1.0277e-05
2.814e-08
d
yr
n .2528186764558656 1.8246e-09 deg/d
Q 3.127622653820571 1.5048e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1540  
   data-arc span      31008 days (84.90 yr)  
   first obs. used      1929-10-01  
   last obs. used      2014-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49823  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:54:01  

Additional Information
 Earth MOID = .821054 AU 
 T_jup = 3.431 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO299025  
rotation period rot_per 80.5 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]

8736 Shigehisa           Discovered 1997 Jan. 9 by T. Kobayashi at Oizumi.
Osao Shigehisa (b. 1936) has actively observed variable stars since 1952. An enthusiastic recorder of the activities of Japanese amateur astronomers, he played an important role in compiling a History of Amateur Astronomy in Japan in 1987, as well as a sequel in 1994.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080321/MPCPages.arcLast Updated: 2008-03-26

Alternate Designations
 1997 AD7 = 1929 TC = 1971 HD = 1980 XL1 = 1980 YU = 1991 NM9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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