Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
8736 Shigehisa (1997 AD7)
Classification: Main-belt Asteroid          SPK-ID: 2008736
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2606014434383921 2.9721e-08  
a 2.478335271068681 7.9062e-09 au
q 1.832477522103904 7.2815e-08 au
i 2.782881079103904 3.2243e-06 deg
node 166.0843590307363 8.5817e-05 deg
peri 185.5344532888125 8.6295e-05 deg
M 110.285790980102 1.209e-05 deg
tp 2458563.928304938696
(2019-Mar-21.42830494)
4.6396e-05 TDB
period 1425.07759907553
3.90
6.8192e-06
1.867e-08
d
yr
n .2526178225196561 1.2088e-09 deg/d
Q 3.124193020033458 9.9665e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2445  
   data-arc span      33259 days (91.06 yr)  
   first obs. used      1929-10-01  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48383  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:18:46  

Additional Information
 Earth MOID = .826901 au 
 Jupiter MOID = 2.31451 au 
 T_jup = 3.431 
[ 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 13.2   n/a MPO458916  
diameter diameter 3.755 km 0.378 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 80.5 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.657   0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-01 09:51 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin