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100750 (1998 EX8)
Classification: Main-belt Asteroid          SPK-ID: 2100750
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2145954821462091 3.5372e-08  
a 2.677665007184945 1.0336e-08 au
q 2.103050193942059 9.2223e-08 au
i 11.39833823609083 6.3963e-06 deg
node 37.83908577684438 1.8612e-05 deg
peri 99.76111512626807 2.494e-05 deg
M 99.71163901967726 1.5162e-05 deg
tp 2458757.222032538375
(2019-Sep-30.72203254)
6.6494e-05 TDB
period 1600.415657140016
4.38
9.2662e-06
2.537e-08
d
yr
n .2249415633956802 1.3024e-09 deg/d
Q 3.252279820427831 1.2554e-08 au
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      8148 days (22.31 yr)  
   first obs. used      1998-03-06  
   last obs. used      2020-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:36  

Additional Information
 Earth MOID = 1.1509 au 
 Jupiter MOID = 1.89591 au 
 T_jup = 3.317 
[ 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 14.89   n/a E2021B55  

100750 (1998 EX8)          Discovered 1998-Mar-06 by Kagawa, T. at Gekko
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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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
1938-Dec-11 13:38 00:01 Jupiter 1.9007709150973 1.90077037345933 1.90077145673549 2.20823720650906 1.99626414417477 2429244.067732701 1.36479650687158 370.999833862482 38.8318287081603 -85.3083802890564 1214614.59297256 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 15:33:38 2021-Apr-13 15:33
2022-Jul-25 20:30 < 00:01 Jupiter 1.93564455442024 1.93564396849097 1.93564514035214 3.08086533772673 2.93539559377489 2459786.354104040 0.251158378720413 382.421940819575 15.3223137696111 -87.5798682934001 1791546.95243146 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 15:33:38 2021-Apr-13 15:33
2057-Mar-29 01:16 < 00:01 Jupiter 1.91735276956604 1.91735217349923 1.91735336563297 1.84797107047148 1.591057439565 2472451.552830809 0.769738474417873 281.749625013222 61.1953702783234 -82.0652485908256 1496316.15418767 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 15:33:38 2021-Apr-13 15:33
2140-Nov-16 12:27 00:02 Jupiter 1.8864524174221 1.88645189379731 1.88645294104678 2.67126440899191 2.49752834688017 2502999.018707193 2.10578061099003 551.31012082365 17.8139154848921 -87.3523808372007 1469921.11932734 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 15:33:38 2021-Apr-13 15:33
2175-Jul-17 08:05 00:03 Jupiter 1.96914088981906 1.9691395825449 1.96914219711515 1.60684020078593 1.3121123913134 2515659.836515714 2.87362479127707 460.0542539148 100.300921459772 -66.6110154042408 1635996.35390749 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 15:33:38 2021-Apr-13 15:33

Alternate Designations
 1998 EX8 = 2001 TO43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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