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17838 (1998 HJ94)
Classification: Main-belt Asteroid          SPK-ID: 2017838
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .101453049715265 4.0756e-08  
a 3.171219513606577 2.134e-08 au
q 2.84948962263463 1.2225e-07 au
i 15.85027019800992 4.7866e-06 deg
node 222.6534232718695 1.4869e-05 deg
peri 209.7235298472298 2.8142e-05 deg
M 106.5692631556027 2.3094e-05 deg
tp 2458389.885171342707
(2018-Sep-28.38517134)
0.00013215 TDB
period 2062.708625428539
5.65
2.0821e-05
5.7e-08
d
yr
n .1745278007577091 1.7617e-09 deg/d
Q 3.492949404578524 2.3505e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      9012 days (24.67 yr)  
   first obs. used      1995-10-14  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:16:03  

Additional Information
 Earth MOID = 1.87299 au 
 Jupiter MOID = 1.90842 au 
 T_jup = 3.135 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457140.5 (2015-Apr-28.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1021728880719021 4.0589e-08  
q 2.846700914816616 1.2175e-07 au
tp 2456330.770564827870
(2013-Feb-07.27056483)
0.00013317 TDB
node 222.6815751975307 1.4868e-05 deg
peri 210.4435797735178 2.8068e-05 deg
i 15.85224813686964 4.7871e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      9012 days (24.67 yr)  
   first obs. used      1995-10-14  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:16:03  

Additional Information
 Jupiter MOID = 1.90842 au 
 T_jup = 3.135 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.64743165285657E-15 -4.89213500901518E-15 -1.678481713979747E-12 5.905896732051135E-15 -3.003285038136861E-13 -1.483105389121E-15
q -4.89213500901518E-15 1.482348152663198E-14 4.914795474446181E-12 -1.904315790993116E-14 9.025779685258167E-13 5.772309824658027E-15
tp -1.678481713979747E-12 4.914795474446181E-12 1.773519702484869E-8 -1.106061234985208E-11 3.18616952364206E-9 3.217833380401679E-12
node 5.905896732051135E-15 -1.904315790993116E-14 -1.106061234985208E-11 2.210538867911445E-10 -2.14478762300164E-10 -1.637055267289318E-11
peri -3.003285038136861E-13 9.025779685258167E-13 3.18616952364206E-9 -2.14478762300164E-10 7.877999663201261E-10 1.650668888729227E-11
i -1.483105389121E-15 5.772309824658027E-15 3.217833380401679E-12 -1.637055267289318E-11 1.650668888729227E-11 2.291598195900808E-11

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 13.0   n/a MPO435865  
diameter diameter 14.807 km 0.271 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17838 (1998 HJ94)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ 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
1947-Oct-22 20:53 00:02 Jupiter 1.95599867429506 1.9559982218638 1.95599912672844 4.76130466813847 4.66946949490071 2432481.370307441 2.07818777826781 209.399693426006 18.8050275231201 -86.7172844384264 3915034.97380613 T 30 CATAB v2.0f-lin.ifort 2020-Jun-23 18:16:21 2020-Jun-23 18:16
2078-Jan-07 09:42 00:02 Jupiter 1.97605422142375 1.97605359753138 1.97605484532162 4.88656093732373 4.79804033741333 2480040.903994943 1.95616211606601 226.85379875819 19.312636392126 84.5241063664864 3637943.33199939 T 30 CATAB v2.0f-lin.ifort 2020-Jun-23 18:16:21 2020-Jun-23 18:16
2197-Apr-12 10:13 00:06 Jupiter 1.98965278383212 1.98965216451451 1.98965340317099 4.39354106876632 4.29555300922905 2523599.925986223 5.92793357145165 479.593770463661 21.4430895050654 -86.0561212972842 2863034.56611413 T 30 CATAB v2.0f-lin.ifort 2020-Jun-23 18:16:21 2020-Jun-23 18:16

Alternate Designations
 1998 HJ94 = 1995 TJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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