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 ]  
5309 MacPherson (1981 ED25)
Classification: Main-belt Asteroid          SPK-ID: 2005309
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .234625724238219 5.0084e-08  
a 2.252060518726703 1.0546e-08 AU
q 1.723669188492151 1.12e-07 AU
i 4.043786346797571 5.2236e-06 deg
node 202.1978473124204 8.1778e-05 deg
peri 125.3302785562079 8.2684e-05 deg
M 220.664068467187 1.4155e-05 deg
tp 2457478.281288097468
(2016-Mar-30.78128810)
5.0703e-05 JED
period 1234.435811516306
3.38
8.6709e-06
2.374e-08
d
yr
n .2916312024015228 2.0485e-09 deg/d
Q 2.780451848961254 1.302e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      998  
   data-arc span      13409 days (36.71 yr)  
   first obs. used      1978-05-09  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54182  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:12:53  

Additional Information
 Earth MOID = .71708 AU 
 T_jup = 3.586 
[ 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 14.3 mag n/a MPO263395  

5309 MacPherson           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Glenn MacPherson (b. 1950), curator at the Smithsonian's National Museum of Natural History, has studied chondrules and Ca-Al-rich inclusions to investigate the nebular processes that formed chondritic meteorites. His work on short-lived isotopes has helped constrain the timing of these processes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1981 ED25 = 1975 NO1 = 1982 SD5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Feb-28 20:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin