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 ]  
15021 Alexkardon (1998 SX123)
Classification: Main-belt Asteroid          SPK-ID: 2015021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180010619849763 4.1758e-08  
a 2.352765436133283 8.7504e-09 au
q 1.929242671613833 1.0004e-07 au
i 2.639338667858489 5.3651e-06 deg
node 38.75003931215866 8.4679e-05 deg
peri 26.21639054926741 8.5737e-05 deg
M 325.1361663058653 1.4423e-05 deg
tp 2459128.155348187466
(2020-Oct-05.65534819)
5.3088e-05 TDB
period 1318.154674286984
3.61
7.3537e-06
2.013e-08
d
yr
n .2731090721160861 1.5236e-09 deg/d
Q 2.776288200652734 1.0326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      910  
   data-arc span      17250 days (47.23 yr)  
   first obs. used      1971-03-24  
   last obs. used      2018-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56248  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:28:09  

Additional Information
 Earth MOID = .943122 au 
 Jupiter MOID = 2.53178 au 
 T_jup = 3.533 
[ 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 15.3   n/a MPO435841  
diameter diameter 2.392 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.257   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15021 Alexkardon           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Alex Kardon (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his behavioral and social sciences project. He attends the South Side High School, Rockville Centre, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030216/MPCPages.arcLast Updated: 2011-11-22

Alternate Designations
 1998 SX123 = 1991 XT1 = 2304 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-13 15:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin