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 ]  
71204 (1999 XQ242)
Classification: Main-belt Asteroid          SPK-ID: 2071204
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2069496084181984 3.8725e-08  
a 2.664460786473524 1.49e-08 au
q 2.113051670067183 1.0082e-07 au
i 14.19661063666034 6.0003e-06 deg
node 36.67132551619 1.7436e-05 deg
peri 123.4737179926117 2.282e-05 deg
M 124.0653589489255 1.4337e-05 deg
tp 2458053.029828430102
(2017-Oct-26.52982843)
6.2171e-05 TDB
period 1588.592202004588
4.35
1.3325e-05
3.648e-08
d
yr
n .2266157416269127 1.9009e-09 deg/d
Q 3.215869902879864 1.7983e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      11539 days (31.59 yr)  
   first obs. used      1987-01-03  
   last obs. used      2018-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47732  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 02:13:54  

Additional Information
 Earth MOID = 1.15464 au 
 Jupiter MOID = 1.86083 au 
 T_jup = 3.310 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456624.5 (2013-Nov-28.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2058837499731386 3.8848e-08  
q 2.116274143092203 1.0096e-07 au
tp 2456462.610374765948
(2013-Jun-19.11037477)
6.111e-05 TDB
node 36.71892195325361 1.7421e-05 deg
peri 123.3631741783734 2.284e-05 deg
i 14.20117181677473 6.0008e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      11539 days (31.59 yr)  
   first obs. used      1987-01-03  
   last obs. used      2018-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47732  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 02:13:54  

Additional Information
 Jupiter MOID = 1.86083 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.509198496344785E-15 -3.897332045147419E-15 5.478355423145132E-13 8.302002123103847E-15 1.525648802774726E-13 6.304162830634736E-16
q -3.897332045147419E-15 1.01935890733921E-14 -1.460587395898781E-12 -2.278150499447884E-14 -3.985770783408522E-13 -1.459269537552346E-15
tp 5.478355423145132E-13 -1.460587395898781E-12 3.734415719788629E-9 5.697075305778224E-12 9.156709830873976E-10 9.879442686455267E-12
node 8.302002123103847E-15 -2.278150499447884E-14 5.697075305778224E-12 3.035082080212571E-10 -2.92351765355072E-10 1.827838587593933E-11
peri 1.525648802774726E-13 -3.985770783408522E-13 9.156709830873976E-10 -2.92351765355072E-10 5.216551971593151E-10 -1.533856054224517E-11
i 6.304162830634736E-16 -1.459269537552346E-15 9.879442686455267E-12 1.827838587593933E-11 -1.533856054224517E-11 3.60097882366367E-11

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 14.1   n/a MPO449449  
diameter diameter 4.835 km 0.425 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71204 (1999 XQ242)          Discovered 1999-Dec-13 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XQ242 = 1987 AG = 1998 SK11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin