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136923 (1998 JH2)
Classification: Amor [NEO]          SPK-ID: 2136923
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 229 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4415051037129797 3.5109e-08  
a 2.134492738734679 1.1783e-08 au
q 1.192103300745022 7.9717e-08 au
i 6.625636254315519 4.7025e-06 deg
node 51.1092036657359 2.4974e-05 deg
peri 287.2865008442003 2.5412e-05 deg
M 298.2252687143263 6.5733e-06 deg
tp 2459195.955913108139
(2020-Dec-12.45591311)
2.2169e-05 TDB
period 1139.043865582111
3.12
9.432e-06
2.582e-08
d
yr
n .31605455318968 2.6171e-09 deg/d
Q 3.076882176724336 1.6986e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1029  
   data-arc span      12288 days (33.64 yr)  
   first obs. used      1986-11-02  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50273  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-12 06:38:09  

Additional Information
 Earth MOID = .219577 au 
 Jupiter MOID = 2.36172 au 
 T_jup = 3.579 
[ 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 16.2   n/a MPO436675  
rotation period rot_per 15.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]

136923 (1998 JH2)          Discovered 1998-May-01 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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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
1908-Aug-31 11:46 < 00:01 Earth 0.219748772060534 0.219748083462623 0.219749460733742 3.40907801102611 3.40551943958528 2418184.990228245 0.178642472123053 218.31812483426 11.6034345659456 81.436980503173 3450782.41902474 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1933-Sep-18 16:40 00:03 Earth 0.380471460912092 0.380463020406829 0.380479902228379 3.37019117977229 3.36811258571565 2427334.194413061 2.55251807485015 972.274202544397 9.24445015557923 64.2868114145445 1474325.1678326 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1936-Jul-23 12:28 00:03 Earth 0.474869812496074 0.474861579422373 0.474878075286534 1.4546588560532 1.45079648863252 2428373.019376097 2.59301129424176 5947.39174132225 9.71979280951873 -85.975179827716 1152119.98037279 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1949-Jun-11 21:10 00:01 Mars 0.0566013551848557 0.0565931634472166 0.056609547051658 8.50578014787745 8.50518547191225 2433079.382198194 1.40730937252514 430.185455002847 10.975393837711 18.2822362039407 236482.201839502 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1961-Aug-31 11:11 < 00:01 Earth 0.241849515893604 0.241846039072993 0.241852992722711 4.10459266500155 4.10190769685955 2437542.966244854 0.173358043998001 187.689251160137 17.537637565264 22.8717411910641 351533.94679217 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1977-Jan-20 16:40 00:01 Mars 0.0883045362758403 0.0883020821784306 0.0883069905840352 6.73447977913979 6.73399834748435 2443164.194621641 1.12188500996625 249.081102253156 15.7168773890641 -60.7733685229702 755966.972045922 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
1986-Sep-05 22:14 < 00:01 Earth 0.269198812054792 0.269196095059341 0.269201529134251 3.67073884325701 3.66804144341547 2446679.426495629 0.307167173998584 274.838411767136 17.0394802949502 60.6735988455243 2123584.95248376 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2014-Aug-28 03:25 < 00:01 Earth 0.345226155254973 0.345225858357977 0.345226452151969 5.66221018023325 5.66084693193897 2456897.642208624 0.197238204130343 15.1940533088545 14.7938164903083 -81.8487940009266 695479.968404242 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2039-Sep-03 19:15 < 00:01 Earth 0.218516664251157 0.218516430769371 0.218516897737538 3.55252764803794 3.54909364811577 2466035.302173504 0.0934829372094476 78.3315777011438 8.90579671396569 -84.5043696937625 14644421.2002095 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2064-Sep-17 10:33 00:02 Earth 0.363094211470392 0.363087118464844 0.363101304868091 3.67908488934406 3.67708976027937 2475180.939378047 1.68733435212201 692.519475183039 8.86847396250766 59.2591316446025 1418560.37026386 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2067-Jul-22 21:01 00:02 Earth 0.494990784565595 0.494983661773152 0.49499795085554 1.25215722405844 1.24785092869842 2476219.376038031 2.16326146558536 7339.71366668334 7.31184431775585 -87.2495977122873 986217.886442723 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2077-May-01 22:04 00:02 Mars 0.0176544367429907 0.0176469759778975 0.017661899095175 7.82405673630628 7.82198383863274 2479790.419200176 1.63005794763822 456.280950607715 10.8239573086444 35.3807000361848 140054.250720666 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2092-Aug-30 11:56 < 00:01 Earth 0.313153821026691 0.313152864644004 0.31315477740977 5.26378692102881 5.26217024485136 2485389.997062884 0.0729980779992073 51.0671612632695 15.412065531605 22.1865375623421 584498.919985864 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2117-Sep-05 01:15 < 00:01 Earth 0.225560153052962 0.225554777238376 0.225565528872331 3.97831310615569 3.97534271818242 2494525.551919944 0.279879241530298 273.053910381688 19.8202776383925 11.7251040960706 142729.387643329 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2142-Sep-09 00:57 00:02 Earth 0.248099644482936 0.248078875423322 0.248120424964716 3.61170123060472 3.60872646132908 2503660.539248234 1.78633630375011 2850.91429716968 17.6460481958018 68.7095952029732 1637744.90594284 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2167-Sep-23 08:30 00:13 Earth 0.372436886579016 0.372384147821391 0.372489668308379 3.43846852919487 3.43638727046893 2512805.854360905 12.9578131181744 6836.88687735287 10.5219994403401 67.3379122250863 2080909.22753721 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38
2195-Sep-02 23:30 00:06 Earth 0.332780789899286 0.332715301272978 0.332846280922983 5.74125712544654 5.73986236421519 2523012.479064980 5.60787234272237 3556.57674951168 15.2689943920483 23.3654187415918 693420.906602851 T 229 CATAB v2.0f-lin.ifort 2020-Jul-12 06:38:22 2020-Jul-12 06:38

Alternate Designations
 1998 JH2 = 1986 VH9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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