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 ]  
49888 (1999 XQ156)
Classification: Main-belt Asteroid          SPK-ID: 2049888
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257099870283758 3.1583e-08  
a 2.281427391510076 9.3064e-09 au
q 1.994629183717163 6.9585e-08 au
i 6.937223115956339 3.9464e-06 deg
node 228.2075535603161 2.8025e-05 deg
peri 51.68242458484357 3.3488e-05 deg
M 21.73679446424984 1.6897e-05 deg
tp 2458524.502133186692
(2019-Feb-10.00213319)
5.9039e-05 TDB
period 1258.659923282989
3.45
7.7015e-06
2.109e-08
d
yr
n .286018481514057 1.7501e-09 deg/d
Q 2.568225599302989 1.0476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      920  
   data-arc span      7825 days (21.42 yr)  
   first obs. used      1998-06-25  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55213  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:34  

Additional Information
 Earth MOID = .986496 au 
 Jupiter MOID = 2.53886 au 
 T_jup = 3.585 
[ 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 15.6   n/a MPO502488  

49888 (1999 XQ156)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XQ156 = 2001 FN164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-18 18:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin