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120811 (1998 HT17)
Classification: Main-belt Asteroid          SPK-ID: 2120811
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1700780964163789 4.2348e-08  
a 2.57868385147646 1.8617e-08 au
q 2.140106210757688 1.0578e-07 au
i 3.974556193163857 5.2526e-06 deg
node 323.2563742715874 6.6284e-05 deg
peri 254.4320985573814 7.0444e-05 deg
M 158.3997481395255 3.1073e-05 deg
tp 2458535.000760245680
(2019-Feb-20.50076025)
0.00012473 TDB
period 1512.50067708771
4.14
1.6379e-05
4.484e-08
d
yr
n .2380164223748797 2.5775e-09 deg/d
Q 3.017261492195233 2.1783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      411  
   data-arc span      8322 days (22.78 yr)  
   first obs. used      1998-03-25  
   last obs. used      2021-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64479  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:58  

Additional Information
 Earth MOID = 1.13605 au 
 Jupiter MOID = 1.97944 au 
 T_jup = 3.402 
[ 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 16.15   n/a E2021B55  

120811 (1998 HT17)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ 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
1905-Apr-30 14:06 00:03 Jupiter 1.9948492821793 1.99484816207448 1.99485040228343 1.97415320283402 1.74587265661262 2416966.087711892 3.41126356592776 83.5401590531983 18.5153978554263 -84.5353064370425 1403890.98995497 T 16 CATAB v2.0f-lin.ifort 2021-Feb-24 09:25:59 2021-Feb-24 09:25
1987-Dec-30 06:42 < 00:01 Jupiter 1.96317208724612 1.96317170406553 1.9631724704266 1.91210981441346 1.67130242625944 2447159.778946837 0.863821966270981 72.5335818679162 25.3694887750833 -89.7848424685302 2337390.29152365 T 16 CATAB v2.0f-lin.ifort 2021-Feb-24 09:25:59 2021-Feb-24 09:25
2070-Aug-31 13:27 00:02 Jupiter 1.97565066685152 1.97565020853972 1.97565112516444 2.06853951533838 1.84970102958703 2477355.060313520 1.70277023651686 116.017008688211 21.1704605469494 84.4082768701498 2365563.50925432 T 16 CATAB v2.0f-lin.ifort 2021-Feb-24 09:25:59 2021-Feb-24 09:25
2166-Mar-06 15:38 00:05 Jupiter 1.97436500136402 1.97436447711825 1.97436552561012 1.90284678635484 1.66216897556913 2512240.151305793 4.67049297401928 124.031572884774 24.3747885014477 85.9301552137609 2346771.89966233 T 16 CATAB v2.0f-lin.ifort 2021-Feb-24 09:25:59 2021-Feb-24 09:25

Alternate Designations
 1998 HT17 = 2002 CW240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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