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 ]  
173340 (1999 XY23)
Classification: Main-belt Asteroid          SPK-ID: 2173340
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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07348588296541164 2.4838e-07  
a 2.513425573525536 9.9271e-09 au
q 2.328724275987166 6.2275e-07 au
i 8.000530633494082 7.5649e-06 deg
node 235.1730826591568 2.6775e-05 deg
peri 181.0063504381452 0.00013648 deg
M 45.61317309430358 0.00011827 deg
tp 2458816.089665483275
(2019-Nov-28.58966548)
0.00047833 TDB
period 1455.450606095015
3.98
8.6228e-06
2.361e-08
d
yr
n .2473460785906592 1.4654e-09 deg/d
Q 2.698126871063907 1.0657e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1047  
   data-arc span      10310 days (28.23 yr)  
   first obs. used      1991-11-07  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:02:31  

Additional Information
 Earth MOID = 1.34037 au 
 Jupiter MOID = 2.58114 au 
 T_jup = 3.443 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456808.5 (2014-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07264270712861812 2.5092e-07  
q 2.331052261449284 6.292e-07 au
tp 2457356.044934340512
(2015-Nov-29.54493434)
0.00047864 TDB
node 235.2319847702613 2.6817e-05 deg
peri 179.8683256588076 0.00013589 deg
i 7.992866142787017 7.5611e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1047  
   data-arc span      10310 days (28.23 yr)  
   first obs. used      1991-11-07  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:02:31  

Additional Information
 Jupiter MOID = 2.58114 au 
 T_jup = 3.443 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.296190708311938E-14 -1.578630294611215E-13 -1.154533255843314E-10 -2.564128926036585E-13 -3.218311653698368E-11 5.389015703990262E-14
q -1.578630294611215E-13 3.958886986791216E-13 2.894702843377988E-10 6.427619290960775E-13 8.068228379818263E-11 -1.351079984328139E-13
tp -1.154533255843314E-10 2.894702843377988E-10 2.290968419381394E-7 4.801452603780863E-10 6.377230267753271E-8 -1.095520998273678E-10
node -2.564128926036585E-13 6.427619290960775E-13 4.801452603780863E-10 7.191589253998961E-10 -5.764524341286333E-10 -8.508859876054246E-11
peri -3.218311653698368E-11 8.068228379818263E-11 6.377230267753271E-8 -5.764524341286333E-10 1.846552825828319E-8 5.346872840407178E-11
i 5.389015703990262E-14 -1.351079984328139E-13 -1.095520998273678E-10 -8.508859876054246E-11 5.346872840407178E-11 5.717023587167131E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO352059  

173340 (1999 XY23)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

Alternate Designations
 1999 XY23 = 1995 WL16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-31 14:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin