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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2376569978051135 5.2503e-08  
a 3.030353116741668 1.8833e-08 au
q 2.310168492727475 1.5517e-07 au
i 2.638751733228844 4.4367e-06 deg
node 298.7025193718625 0.00013408 deg
peri 226.0740765693257 0.00013449 deg
M 172.4720739453569 1.0673e-05 deg
tp 2458473.387633005264
(2018-Dec-20.88763301)
5.4712e-05 TDB
period 1926.807305763552
5.28
1.7962e-05
4.918e-08
d
yr
n .1868375726639358 1.7417e-09 deg/d
Q 3.750537740755862 2.3308e-08 au
  Orbit Determination Parameters
   # obs. used (total)      378  
   data-arc span      8531 days (23.36 yr)  
   first obs. used      1998-03-29  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57214  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:13:13  

Additional Information
 Earth MOID = 1.31959 au 
 Jupiter MOID = 1.24923 au 
 T_jup = 3.198 
[ 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 15.81   n/a MPO637341  

100864 (1998 HW54)          Discovered 1998-Apr-21 by LINEAR at Socorro
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
1926-Jul-21 14:03 00:02 Jupiter 1.42071344017221 1.42071194820447 1.42071493228018 0.880951999370371 n/a 2424718.085460929 2.15994511384874 748.39341366136 24.3009163641503 -84.6054969679289 8704349.84262179 F 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
1964-Dec-24 07:10 00:01 Jupiter 1.96098662119202 1.96098530209462 1.96098794028863 2.69499774130884 2.52965195156398 2438753.798837360 1.31796190368159 56.6351974492767 24.1386042518459 72.6283009434743 1046987.92613046 T 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
1973-Nov-06 22:14 00:01 Jupiter 1.4893244035789 1.48932339210892 1.4893254150859 0.952565516329101 n/a 2441993.426724810 1.18435039711585 440.769461798376 26.9229122659314 -84.4364789764163 8233969.89431243 F 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2012-Jan-25 10:22 < 00:01 Jupiter 1.77573303873197 1.77573230041714 1.77573377704548 1.70766830287421 1.40076174002315 2455951.932079113 0.383076271706364 101.99266526527 72.6277817762982 3.07142887476815 1043768.98597259 T 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2020-Nov-21 06:19 < 00:01 Jupiter 1.68847623133869 1.68847547011813 1.68847699257019 1.39091620230707 0.965064643210826 2459174.763470672 0.413638195386495 500.1191567348 83.1423498627809 53.0107322204111 3373207.79734731 T 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2059-Jan-17 23:30 00:01 Jupiter 1.55368965443196 1.55368851529597 1.55369079356827 0.692881935172091 n/a 2473111.479465036 1.32003849131145 73.7148249783059 38.1172242036797 -48.1249244883152 5002731.47328617 F 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2067-Dec-01 04:30 00:01 Jupiter 1.91086445061872 1.91086302475151 1.91086587648429 2.17450796906882 1.96008968640747 2476350.687365241 1.3671375213121 76.6009242098434 17.1486547705708 80.9563404931691 838992.62939437 T 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2106-Mar-28 03:10 00:02 Jupiter 1.43821700460692 1.4382155585026 1.43821845071249 0.305606240225869 n/a 2490346.631817912 2.15576544653266 110.765777623149 43.883181433033 -55.7614325799124 4196393.23518498 F 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2153-Sep-26 13:53 00:03 Jupiter 1.444348330243 1.44434641535787 1.44435024513133 0.371229669300101 n/a 2507696.078510950 2.90144780164162 149.791829468107 35.9026345721701 -52.5240488300108 4854145.67159333 F 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
2162-Sep-28 05:26 00:03 Jupiter 1.9694658333536 1.96946326131569 1.96946840538815 2.49766657015272 2.31909114377852 2510984.726691772 2.70811681498669 83.5053044921033 38.781103867248 64.1096097440295 549724.094311287 T 14 CATAB v2.0g-lin.ifort 2021-Aug-25 02:13:15 2021-Aug-25 02:13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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