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 ]  
243608 (1998 XE23)
Classification: Main-belt Asteroid          SPK-ID: 2243608
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10366894874624 5.0345e-08  
a 2.221420781426219 1.5674e-08 au
q 1.991128424292712 1.1409e-07 au
i 5.246761134198444 4.2407e-06 deg
node 251.619587005449 6.8064e-05 deg
peri 297.7847975102173 7.2436e-05 deg
M 59.57940912907082 2.5989e-05 deg
tp 2458800.357940927097
(2019-Nov-12.85794093)
8.6505e-05 TDB
period 1209.329570727296
3.31
1.2799e-05
3.504e-08
d
yr
n .2976856009429211 3.1506e-09 deg/d
Q 2.451713138559726 1.7299e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7333 days (20.08 yr)  
   first obs. used      1998-12-11  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59408  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:03:26  

Additional Information
 Earth MOID = .997126 au 
 Jupiter MOID = 2.52808 au 
 T_jup = 3.637 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1037574404749963 5.0286e-08  
q 1.990824300508829 1.1409e-07 au
tp 2456382.119403068065
(2013-Mar-30.61940307)
8.0603e-05 TDB
node 251.671948204136 6.8081e-05 deg
peri 297.7124086344125 7.2462e-05 deg
i 5.245956285954191 4.2407e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7333 days (20.08 yr)  
   first obs. used      1998-12-11  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59408  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:03:26  

Additional Information
 Jupiter MOID = 2.52808 au 
 T_jup = 3.637 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.52866853457378E-15 -5.693191571465476E-15 -1.305048053677193E-12 -1.062699756653927E-14 -3.403184739289318E-13 -3.359119053801846E-15
q -5.693191571465476E-15 1.301681433643768E-14 2.988225104667556E-12 2.335812520796378E-14 8.001272809272919E-13 8.153308045372687E-15
tp -1.305048053677193E-12 2.988225104667556E-12 6.496815033992375E-9 -4.18165445653654E-11 2.03899237135633E-9 4.149098808375344E-12
node -1.062699756653927E-14 2.335812520796378E-14 -4.18165445653654E-11 4.635034294813448E-9 -4.62828344041489E-9 3.624571194091241E-11
peri -3.403184739289318E-13 8.001272809272919E-13 2.03899237135633E-9 -4.62828344041489E-9 5.250792084048796E-9 -3.483086718331619E-11
i -3.359119053801846E-15 8.153308045372687E-15 4.149098808375344E-12 3.624571194091241E-11 -3.483086718331619E-11 1.798392764135273E-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 17.3   n/a MPO418302  

243608 (1998 XE23)          Discovered 1998-Dec-11 by Spacewatch at Kitt Peak
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Dec-01 23:27 < 00:01 Iris 0.0450046534153496 0.044978919161259 0.0450303895494485 5.94694629696529 5.94694627548592 2425947.477040301 0.458398851178234 1362.61795517213 69.3797799684587 -19.715889696272 33056.2986565895 T 11 CATAB v2.0e-lin.ifort 2019-Jul-14 10:03:29 2019-Jul-14 10:03
1968-Jan-16 19:19 < 00:01 Eunom 0.0399816243616918 0.0399735660141375 0.0399896852835924 5.53461941392029 5.53461935048285 2439872.304559479 0.667643241917356 650.706865616315 63.078933478004 -52.2310242130977 75123.0138728761 T 11 CATAB v2.0e-lin.ifort 2019-Jul-14 10:03:29 2019-Jul-14 10:03
1968-Jul-02 11:15 00:06 Thisb 0.0171498280357267 0.0171473539747996 0.0171523055420864 3.08375468281562 3.0837545538912 2440039.968571817 6.43577726738525 446.23936784119 55.5047661038188 75.5901574850544 44747.9222270072 T 11 CATAB v2.0e-lin.ifort 2019-Jul-14 10:03:29 2019-Jul-14 10:03
2020-Nov-09 06:51 < 00:01 Iris 0.0396586779505679 0.0396546264046646 0.0396627295140227 6.69063408766122 6.69063406599578 2459162.785446933 0.241433291866899 206.898662564973 74.4096404379873 -13.4056445749022 33455.8180125718 T 11 CATAB v2.0e-lin.ifort 2019-Jul-14 10:03:29 2019-Jul-14 10:03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-11 01:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin