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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1015204508800508 4.0778e-08  
a 3.170594993680219 2.129e-08 au
q 2.848714760363771 1.2229e-07 au
i 15.8518870430234 4.7866e-06 deg
node 222.6512090669804 1.4862e-05 deg
peri 209.6096154832183 2.8116e-05 deg
M 141.605370557925 2.3094e-05 deg
tp 2458389.376833931793
(2018-Sep-27.87683393)
0.00013196 TDB
period 2062.099330230609
5.65
2.077e-05
5.687e-08
d
yr
n .1745793690548071 1.7584e-09 deg/d
Q 3.492475226996667 2.3451e-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 = 1.8715 au 
 Jupiter MOID = 1.9097 au 
 T_jup = 3.135 
[ 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 13.05   n/a E2021B10  
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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