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 ]  
11876 Doncarpenter (1990 EM1)
Classification: Main-belt Asteroid          SPK-ID: 2011876
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .15574808693336 2.8338e-08  
a 2.430256829763423 6.5966e-09 au
q 2.051748977771038 7.0499e-08 au
i 5.406038582459714 3.4777e-06 deg
node 234.0936122736215 3.3096e-05 deg
peri 92.57475943572429 3.5007e-05 deg
M 305.1664362229795 1.2376e-05 deg
tp 2459607.275756783294
(2022-Jan-27.77575678)
4.7884e-05 TDB
period 1383.810703067693
3.79
5.6343e-06
1.543e-08
d
yr
n .2601511891777799 1.0592e-09 deg/d
Q 2.808764681755809 7.624e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2158  
   data-arc span      11445 days (31.33 yr)  
   first obs. used      1990-02-24  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46414  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:49:20  

Additional Information
 Earth MOID = 1.04819 au 
 Jupiter MOID = 2.52934 au 
 T_jup = 3.485 
[ 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 14.22   n/a MPO614063  

11876 Doncarpenter           Discovered 1990 Mar. 2 by E. W. Elst at the European Southern Observatory.
For the past 42 years, Don Carpenter (b. 1938) has been associated with the Stanford research group devoted to passive and active whistler-mode probing of the earth's ionosphere and magnetosphere. In 1966 he discovered the plasmapause in the electron-density distribution of the magnetosphere.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1990 EM1 = 1995 QR2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-29 23:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin