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 ]  
21021 (1988 XL2)
Classification: Main-belt Asteroid          SPK-ID: 2021021
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2260044559725987 8.2107e-08  
a 3.110052498363844 2.7149e-08 au
q 2.407166775424901 2.6229e-07 au
i 15.97556536965216 8.9309e-06 deg
node 44.49681640708627 2.6186e-05 deg
peri 348.4769820317544 3.0962e-05 deg
M 358.8260179079382 1.5021e-05 deg
tp 2457407.032944646572
(2016-Jan-19.53294465)
8.3612e-05 JED
period 2003.318524761592
5.48
2.6231e-05
7.182e-08
d
yr
n .1797018275178394 2.353e-09 deg/d
Q 3.812938221302785 3.3284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      823  
   data-arc span      21965 days (60.14 yr)  
   first obs. used      1955-10-25  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48303  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:46:52  

Additional Information
 Earth MOID = 1.41482 au 
 Jupiter MOID = 1.62586 au 
 T_jup = 3.121 
[ 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 12.9 mag n/a MPO358830  

21021 (1988 XL2)          Discovered 1988-Dec-07 by Oshima, Y. at Gekko
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 XL2 = 1999 TX27 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-11 06:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin