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100864 (1998 HW54)
Classification: Main-belt Asteroid          SPK-ID: 2100864
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2332213922559754 5.2031e-08  
a 3.037353188791625 1.9044e-08 au
q 2.328977449328515 1.525e-07 au
i 2.648114268887915 4.5499e-06 deg
node 298.807528538314 0.00013883 deg
peri 225.8291847230971 0.00013939 deg
M 99.15324516143343 1.1583e-05 deg
tp 2458467.967887076867
(2018-Dec-15.46788708)
6.0939e-05 TDB
period 1933.487505529428
5.29
1.8185e-05
4.979e-08
d
yr
n .1861920488084172 1.7511e-09 deg/d
Q 3.745728928254734 2.3486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      7767 days (21.26 yr)  
   first obs. used      1998-03-29  
   last obs. used      2019-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56975  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:12:31  

Additional Information
 Earth MOID = 1.33763 au 
 Jupiter MOID = 1.25554 au 
 T_jup = 3.197 
[ 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 15.7   n/a MPO432536  

100864 (1998 HW54)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ 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
1926-Jul-21 14:04 00:02 Jupiter 1.42071312676455 1.42071160834182 1.42071464533214 0.88095232494269 n/a 2424718.085800198 2.22524901647783 759.727781544724 24.4710759340198 -84.5849629622753 8643528.73073879 F 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
1964-Dec-24 07:11 00:01 Jupiter 1.96098676365759 1.96098542981306 1.96098809750134 2.6949983777057 2.52965264101934 2438753.798959546 1.34239758855765 57.5064262441264 24.2611971965508 72.4582180376258 1025554.82195203 T 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
1973-Nov-06 22:15 00:01 Jupiter 1.48932434788991 1.4893233223598 1.48932537345761 0.95256609074702 n/a 2441993.426804116 1.20076116946456 444.764920663047 27.3781591817038 -84.4162111545004 8096777.9820476 F 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2012-Jan-25 10:22 < 00:01 Jupiter 1.77573302989628 1.77573223266685 1.7757338271242 1.70766806049623 1.40076144096464 2455951.932069450 0.409527915364904 108.15979944529 77.8152935628589 3.7472391934913 974020.302771912 T 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2020-Nov-21 06:19 < 00:01 Jupiter 1.68847623996836 1.68847539951646 1.6884770804336 1.39091670788051 0.96506537166231 2459174.763472055 0.455502243270632 537.243834515139 85.0063993627522 53.5135952368428 3206347.73483928 T 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2059-Jan-17 23:30 00:01 Jupiter 1.55368965278677 1.55368844442863 1.55369086114526 0.692881812008486 n/a 2473111.479434327 1.36467431091278 77.714248118324 40.2610030885656 -47.5897796463125 4713969.14003153 F 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2067-Dec-01 04:30 00:01 Jupiter 1.91086451083057 1.91086301711097 1.91086600454833 2.17450864597659 1.96009044324019 2476350.687303725 1.40362980418193 81.5305251739365 17.2025694641358 80.6174338202045 797967.2844333 T 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2106-Mar-28 03:09 00:02 Jupiter 1.43821673277623 1.4382152480759 1.43821821747784 0.305605145725065 n/a 2490346.631481009 2.19027024465198 114.160932491306 46.6081002291941 -56.4967534212788 3985876.47024269 F 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2153-Sep-26 13:52 00:03 Jupiter 1.44434784303459 1.44434589926107 1.44434978681137 0.371227643730381 n/a 2507696.077972420 2.93797038063808 152.37737243731 37.9003606890976 -52.8101322179827 4619967.5496261 F 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
2162-Sep-28 05:26 00:03 Jupiter 1.96946645477767 1.96946384678481 1.96946906276707 2.49766946901117 2.3190943233461 2510984.726219602 2.74323432350735 86.6433134992401 40.0170936660786 65.5676171682788 533877.368322864 T 12 CATAB v2.0f-lin.ifort 2020-Feb-24 01:12:45 2020-Feb-24 01:12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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