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 ]  
38598 (1999 XQ208)
Classification: Jupiter Trojan          SPK-ID: 2038598
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04963942773171375 4.5717e-08  
a 5.150411015829468 1.2245e-07 au
q 4.894747560420579 3.1663e-07 au
i 11.60672377981457 6.8229e-06 deg
node 44.26175773950532 2.8232e-05 deg
peri 64.59563479897977 9.09e-05 deg
M 258.9463271366128 8.8976e-05 deg
tp 2460198.925003189597
(2023-Sep-11.42500319)
0.0010759 TDB
period 4269.345080920531
11.69
0.00015225
4.168e-07
d
yr
n .08432206654102996 3.007e-09 deg/d
Q 5.406074471238358 1.2852e-07 au
  Orbit Determination Parameters
   # obs. used (total)      529  
   data-arc span      10808 days (29.59 yr)  
   first obs. used      1991-04-15  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:09:45  

Additional Information
 Earth MOID = 3.93113 au 
 Jupiter MOID = .0711 au 
 T_jup = 2.957 
[ 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 12.4   n/a MPO439356  
diameter diameter 13.211 km 1.077 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.122   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

38598 (1999 XQ208)          Discovered 1999-Dec-13 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XQ208 = 1997 UL26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-28 09:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin