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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
71031 (1999 XE68)
Classification: Main-belt Asteroid          SPK-ID: 2071031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0419585284091624 4.3371e-08  
a 2.865361080983751 2.1184e-08 au
q 2.745134746664786 1.3134e-07 au
i 2.894148426407573 4.4816e-06 deg
node 136.2424929804011 0.00010322 deg
peri 302.0920780813348 0.00012091 deg
M 355.5223185286445 6.2205e-05 deg
tp 2458622.535258957226
(2019-May-19.03525896)
0.00030614 TDB
period 1771.607309574865
4.85
1.9647e-05
5.379e-08
d
yr
n .2032053029214413 2.2535e-09 deg/d
Q 2.985587415302716 2.2073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      894  
   data-arc span      8348 days (22.86 yr)  
   first obs. used      1996-03-12  
   last obs. used      2019-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50751  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:39:33  

Additional Information
 Earth MOID = 1.76185 au 
 Jupiter MOID = 2.11435 au 
 T_jup = 3.297 
[ 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 14.8   n/a MPO417318  
diameter diameter 3.284 km 0.963 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.187 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Yoshida, F.; Dermawan, B.; Nakamura, T.; Ito, T.; et al. (2005) ACM 2005, abstract.]
[Yoshida, F.; Ito, T.; Dermawan, B.; Nakamura, T.; et al. (2016) Icarus 269, 15-22.]
geometric albedo albedo 0.136   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71031 (1999 XE68)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XE68 = 1996 EF11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-22 07:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin