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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03272692998867817 1.0202e-07  
a 2.582919748864703 2.9411e-08 AU
q 2.498388715077234 2.5826e-07 AU
i 21.92813013855212 1.2042e-05 deg
node 327.8420460980468 2.2409e-05 deg
peri 162.7250558122925 0.00015269 deg
M 291.9077765053505 0.00015128 deg
tp 2457287.287231391024
(2015-Sep-21.78723139)
0.0006373 JED
period 1516.228990655317
4.15
2.5897e-05
7.09e-08
d
yr
n .2374311546730203 4.0553e-09 deg/d
Q 2.667450782652172 3.0373e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      447  
   data-arc span      7262 days (19.88 yr)  
   first obs. used      1995-03-04  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55392  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:28:31  

Additional Information
 Earth MOID = 1.51398 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
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 2015-Jul-28 21:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin