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118270 (1998 HN129)
Classification: Main-belt Asteroid          SPK-ID: 2118270
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620890574994295 5.5919e-08  
a 2.79509259853767 1.9926e-08 au
q 2.342038673617067 1.5521e-07 au
i 7.682181226730725 7.2427e-06 deg
node 205.6305344360717 3.3399e-05 deg
peri 327.9220375401864 3.8249e-05 deg
M 277.2728661197014 1.9991e-05 deg
tp 2459392.727648861526
(2021-Jun-27.22764886)
9.7159e-05 TDB
period 1706.839666347688
4.67
1.8252e-05
4.997e-08
d
yr
n .2109161200655311 2.2554e-09 deg/d
Q 3.248146523458272 2.3155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      8274 days (22.65 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55388  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:45:07  

Additional Information
 Earth MOID = 1.35055 au 
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
[ 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 15.4   n/a MPO493675  

118270 (1998 HN129)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ 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
1916-Jul-06 22:20 00:04 Jupiter 1.80503378572696 1.80503221501568 1.80503535645712 2.75405544315182 2.57804380247636 2421051.430225255 3.73229003350424 329.904579796154 24.3366840937776 82.5709430922591 1630542.54705299 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
1939-Sep-13 20:56 00:03 Jupiter 1.75351735260851 1.75351682627724 1.75351787894089 2.36238049324302 2.14819868958725 2429520.372302531 2.66089443424434 241.522505738806 35.6815946256265 -85.0581661587089 1362619.25056647 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
1962-Nov-20 13:10 00:02 Jupiter 1.80053513959145 1.80053447060121 1.80053580858282 2.08121225614414 1.84135494754423 2437989.048723383 1.80977611627656 137.912417539126 53.5448813449835 -77.3502263250037 1457297.50197685 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
1986-Jan-06 21:08 00:01 Jupiter 1.94388780960486 1.94388706365602 1.94388855555392 2.09653695247273 1.87723055538321 2446437.380335296 1.05985489915714 81.1084755473929 24.0228428843375 -78.0813428775084 2191551.9799635 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
2071-Apr-19 00:11 00:02 Jupiter 1.91978396051166 1.91978304763114 1.91978487339382 3.14778512718171 3.0043529746856 2477585.507532358 1.70547215460918 127.426296180503 25.9865285932812 77.223847932203 2036722.31932174 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
2094-Jun-17 09:46 00:02 Jupiter 1.78796803242425 1.78796729948478 1.78796876536819 2.73619083337901 2.55719980806512 2486045.906892623 2.42535556996642 211.199219780788 25.4112596036707 86.3988960695315 1611661.41374517 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
2117-Aug-27 11:58 00:03 Jupiter 1.74991716483422 1.74991656238669 1.74991776728592 2.41746447598014 2.20818091133977 2494516.998682843 3.32365769097901 274.32613224369 35.4697290841889 -82.1880449859943 1422560.11195508 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
2140-Nov-03 09:20 00:05 Jupiter 1.80497134495204 1.80496959146776 1.8049730984469 2.17964272328877 1.95251079332743 2502985.888607080 4.54948332444944 264.358159868123 54.1005383849509 -66.8298406836546 1554552.91421756 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45
2163-Dec-21 08:41 00:06 Jupiter 1.96063163524435 1.960628338089 1.96063493240171 2.23011066506086 2.02715646502482 2511433.862111048 5.95764678571953 205.082725678719 34.9870865765278 -58.9443785893494 1701609.19177424 T 17 CATAB v2.0f-lin.ifort 2020-Dec-17 22:45:08 2020-Dec-17 22:45

Alternate Designations
 1998 HN129 = 2003 JL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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