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 ]  
249640 (1999 TW168)
Classification: Main-belt Asteroid          SPK-ID: 2249640
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1408391189935411 4.6787e-08  
a 3.17093888562862 2.8549e-08 au
q 2.724346646594324 1.493e-07 au
i 4.424637676572218 5.2582e-06 deg
node 235.2267684263732 6.4009e-05 deg
peri 165.0313335340064 6.6561e-05 deg
M 223.5452614142126 2.0856e-05 deg
tp 2459782.247238193100
(2022-Jul-21.74723819)
0.00012633 TDB
period 2062.434831257876
5.65
2.7853e-05
7.626e-08
d
yr
n .1745509698264922 2.3573e-09 deg/d
Q 3.617531124662916 3.2569e-08 au
  Orbit Determination Parameters
   # obs. used (total)      397  
   data-arc span      7144 days (19.56 yr)  
   first obs. used      1999-10-10  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:25:56  

Additional Information
 Earth MOID = 1.73284 au 
 Jupiter MOID = 1.79001 au 
 T_jup = 3.182 
[ 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 15.4   n/a MPO437159  

249640 (1999 TW168)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-18 21:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin