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 ]  
11769 Alfredjoy (2199 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2011769
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03849864705896559 4.8539e-08  
a 2.597891991953162 1.8421e-08 au
q 2.497876665057644 1.3022e-07 au
i 3.062373004563344 6.6851e-06 deg
node 181.8068789045894 8.3255e-05 deg
peri 57.09833545138873 0.0001357 deg
M 206.6637062069098 0.00011311 deg
tp 2458251.937154632648
(2018-May-13.43715463)
0.00048441 JED
period 1529.431616393491
4.19
1.6267e-05
4.454e-08
d
yr
n .2353815601438302 2.5035e-09 deg/d
Q 2.69790731884868 1.913e-08 au
  Orbit Determination Parameters
   # obs. used (total)      943  
   data-arc span      15491 days (42.41 yr)  
   first obs. used      1973-09-19  
   last obs. used      2016-02-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55468  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:46:57  

Additional Information
 Earth MOID = 1.48701 au 
 Jupiter MOID = 2.27987 au 
 T_jup = 3.413 
[ 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 14.8 mag n/a MPO350895  

11769 Alfredjoy           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Alfred H. Joy (1882-1973) was an astronomer at the Mount Wilson Observatory from 1915 to 1973 who measured spectroscopic parallaxes and radial velocities of stars and studied variable stars. He invented the T Tauri classification.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 2199 T-2 = 1997 LC11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-03 18:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin