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
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
13553 Masaakikoyama (1992 JE)
Classification: Amor [NEO]          SPK-ID: 2013553
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 138 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4641621423501544 3.1362e-08  
a 2.189272136254245 8.4127e-09 AU
q 1.173094891302976 6.769e-08 AU
i 5.873065099837087 2.8557e-06 deg
node 193.5317557189791 3.2551e-05 deg
peri 109.9294455252876 3.574e-05 deg
M 256.6969173435637 7.0968e-06 deg
tp 2457140.014894912585
(2015-Apr-27.51489491)
2.5019e-05 JED
period 1183.172457447622
3.24
6.8199e-06
1.867e-08
d
yr
n .3042667176149483 1.7538e-09 deg/d
Q 3.205449381205514 1.2318e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      749  
   data-arc span      12688 days (34.74 yr)  
   first obs. used      1979-06-24  
   last obs. used      2014-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53536  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:04:05  

Additional Information
 Earth MOID = .188445 AU 
 T_jup = 3.520 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3 mag n/a MPO250346  
rotation period rot_per 38. h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Incomplete or inconclusive result.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm]

13553 Masaakikoyama           Discovered 1992 May 2 by T. Seki at Geisei.
Masaaki Koyama (b. 1934), Japanese baseball player, was known for his superb ball control and was called "a precision throwing machine". Since retiring, he has been active as a coach, baseball commentator and critic. He was inducted into Japan's Baseball Hall of Fame in 2001.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120207/MPCPages.arcLast Updated: 2012-02-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-21 02:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin