Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
JPL Small-Body Database Browser
Search: [ help ]  
8736 Shigehisa (1997 AD7)
Classification: Main-belt Asteroid          SPK-ID: 2008736
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2623587857489177 4.2581e-08  
a 2.476781419851196 1.0217e-08 au
q 1.826976053973556 1.0288e-07 au
i 2.784291512992592 4.0547e-06 deg
node 166.1440889718727 9.8002e-05 deg
peri 185.2117842263207 9.8772e-05 deg
M 117.0119569071014 1.3557e-05 deg
tp 2457137.737999087055
5.1631e-05 JED
period 1423.737579749423
n .2528555859734768 1.5645e-09 deg/d
Q 3.126586785728836 1.2897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      31604 days (86.53 yr)  
   first obs. used      1929-10-01  
   last obs. used      2016-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49883  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:03:20  

Additional Information
 Earth MOID = .820356 au 
 Jupiter MOID = 2.3017 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 LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007)]

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 ]
FirstGov 2016-Apr-29 13:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin