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 ]  
13553 Masaakikoyama (1992 JE)
Classification: Amor [NEO]          SPK-ID: 2013553
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 343 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4641555589669412 1.8924e-08  
a 2.189003222162232 1.5648e-09 au
q 1.172965207999086 4.1075e-08 au
i 5.87545778035931 2.2182e-06 deg
node 193.4681598558535 2.2888e-05 deg
peri 109.9820182973883 2.354e-05 deg
M 267.0113642101785 1.9432e-06 deg
tp 2459506.059227720621
(2021-Oct-18.55922772)
6.5487e-06 TDB
period 1182.954465834461
3.24
1.2685e-06
3.473e-09
d
yr
n .3043227870533921 3.2632e-10 deg/d
Q 3.205041236325378 2.2911e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1983  
   data-arc span      15287 days (41.85 yr)  
   first obs. used      1979-06-24  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40763  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-06 06:01:20  

Additional Information
 Earth MOID = .187486 au 
 Jupiter MOID = 2.11207 au 
 T_jup = 3.520 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.46   n/a E2021B10  
rotation period rot_per 58. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 27-40.]

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-08 21:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin