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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1014530495739505 4.0749e-08  
a 3.171219513645463 2.1338e-08 au
q 2.849489623117711 1.2223e-07 au
i 15.85027018624078 4.7861e-06 deg
node 222.6534231990994 1.4863e-05 deg
peri 209.7235298619317 2.8136e-05 deg
M 106.5692631886005 2.3093e-05 deg
tp 2458389.885171142407
(2018-Sep-28.38517114)
0.00013214 TDB
period 2062.708625466479
5.65
2.0819e-05
5.7e-08
d
yr
n .1745278007544989 1.7615e-09 deg/d
Q 3.492949404173216 2.3503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      9016 days (24.68 yr)  
   first obs. used      1995-10-14  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45702  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:18:35  

Additional Information
 Earth MOID = 1.87299 au 
 Jupiter MOID = 1.90842 au 
 T_jup = 3.135 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457142.5 (2015-Apr-30.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .102170869033942 4.0582e-08  
q 2.846711116575253 1.2172e-07 au
tp 2456330.767317590362
(2013-Feb-07.26731759)
0.00013317 TDB
node 222.6815765332061 1.4862e-05 deg
peri 210.4434563562187 2.8063e-05 deg
i 15.85223260073533 4.7866e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      9016 days (24.68 yr)  
   first obs. used      1995-10-14  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45702  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:18:35  

Additional Information
 Jupiter MOID = 1.90842 au 
 T_jup = 3.135 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.646896732989759E-15 -4.890245225683211E-15 -1.679600424397457E-12 5.88656855662506E-15 -3.005510656143744E-13 -1.484483132023724E-15
q -4.890245225683211E-15 1.481681052703393E-14 4.918828236945802E-12 -1.89830744743149E-14 9.033900712794023E-13 5.774280613370836E-15
tp -1.679600424397457E-12 4.918828236945802E-12 1.773376264090616E-8 -1.097253726251537E-11 3.185739313999725E-9 3.234999194305341E-12
node 5.88656855662506E-15 -1.89830744743149E-14 -1.097253726251537E-11 2.208860890548612E-10 -2.143016698023668E-10 -1.639901636528198E-11
peri -3.005510656143744E-13 9.033900712794023E-13 3.185739313999725E-9 -2.143016698023668E-10 7.875337545450576E-10 1.653714298777619E-11
i -1.484483132023724E-15 5.774280613370836E-15 3.234999194305341E-12 -1.639901636528198E-11 1.653714298777619E-11 2.291112658111727E-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

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