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 ]  
28231 (1999 AL5)
Classification: Main-belt Asteroid          SPK-ID: 2028231
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03264285506776 1.4516e-07  
a 2.583136286463048 4.0852e-08 AU
q 2.498815343043763 3.5214e-07 AU
i 21.92793352505195 1.4403e-05 deg
node 327.8414497806267 2.2975e-05 deg
peri 162.581525055812 0.00017311 deg
M 244.5596867953259 0.0001765 deg
tp 2457286.766557886086
(2015-Sep-21.26655789)
0.00074772 JED
period 1516.419662935418
4.15
3.5973e-05
9.849e-08
d
yr
n .2374013004441844 5.6317e-09 deg/d
Q 2.667457229882332 4.2186e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7052 days (19.31 yr)  
   first obs. used      1995-03-04  
   last obs. used      2014-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5597  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:58:35  

Additional Information
 Earth MOID = 1.51414 AU 
 T_jup = 3.321 
[ 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 13.7 mag n/a MPO267809  

28231 (1999 AL5)          Discovered 1999-Jan-10 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905)
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ 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-Jul-30 03:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin