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 ]  
118318 (1998 XW)
Classification: Main-belt Asteroid          SPK-ID: 2118318
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1452618953994751 4.3603e-08  
a 2.361166009710086 1.089e-08 au
q 2.018178559786784 1.0274e-07 au
i 3.108054026407776 4.4871e-06 deg
node 72.9744302927476 9.3506e-05 deg
peri 76.94684215166505 9.5016e-05 deg
M 256.2324606071377 1.8175e-05 deg
tp 2459382.485808810234
(2021-Jun-16.98580881)
6.8374e-05 TDB
period 1325.220699809168
3.63
9.1679e-06
2.51e-08
d
yr
n .2716528651052916 1.8793e-09 deg/d
Q 2.704153459633389 1.2472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1998-11-15  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55245  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 13:59:26  

Additional Information
 Earth MOID = 1.03201 au 
 Jupiter MOID = 2.29523 au 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO432686  
diameter diameter 1.539 km 0.280 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.247   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118318 (1998 XW)          Discovered 1998-Dec-07 by ODAS at Caussols
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 XW = 2000 HT53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-25 09:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin