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118267 (1998 HR56)
Classification: Main-belt Asteroid          SPK-ID: 2118267
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2564810352298157 4.692e-08  
a 3.059567398022332 2.052e-08 au
q 2.274846384422171 1.4175e-07 au
i 12.51024220075752 6.0196e-06 deg
node 36.0909245517572 2.2704e-05 deg
peri 212.920333237901 2.4754e-05 deg
M 13.02373198338494 1.0283e-05 deg
tp 2458929.783393290459
(2020-Mar-21.28339329)
5.5658e-05 TDB
period 1954.737585809728
5.35
1.9666e-05
5.384e-08
d
yr
n .1841679428550375 1.8528e-09 deg/d
Q 3.844288411622493 2.5784e-08 au
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      8211 days (22.48 yr)  
   first obs. used      1998-03-24  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52843  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:43  

Additional Information
 Earth MOID = 1.27292 au 
 Jupiter MOID = 1.26326 au 
 T_jup = 3.148 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456883.5 (2014-Aug-14.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2548165249935017 4.7058e-08  
q 2.279772778256912 1.4187e-07 au
tp 2456974.274321806299
(2014-Nov-12.77432181)
5.4527e-05 TDB
node 36.12205597584548 2.2693e-05 deg
peri 212.7613722408148 2.4768e-05 deg
i 12.51127482976256 6.0197e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      8211 days (22.48 yr)  
   first obs. used      1998-03-24  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52843  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:43  

Additional Information
 Jupiter MOID = 1.26326 au 
 T_jup = 3.148 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.214436535200943E-15 -6.637530523455703E-15 -2.031507506223834E-13 -3.092169517882872E-15 -9.247612818570394E-14 -2.544268939609542E-15
q -6.637530523455703E-15 2.012707812792152E-14 5.309307495121821E-13 4.016901614598256E-15 2.716734490018842E-13 1.055618920813306E-14
tp -2.031507506223834E-13 5.309307495121821E-13 2.973182409704046E-9 1.723383838156056E-11 5.588494083741664E-10 -1.104809854257198E-11
node -3.092169517882872E-15 4.016901614598256E-15 1.723383838156056E-11 5.14950471805182E-10 -4.997836695137985E-10 -5.475081326804726E-12
peri -9.247612818570394E-14 2.716734490018842E-13 5.588494083741664E-10 -4.997836695137985E-10 6.134704041460005E-10 3.71300816177003E-12
i -2.544268939609542E-15 1.055618920813306E-14 -1.104809854257198E-11 -5.475081326804726E-12 3.71300816177003E-12 3.623618992584412E-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 14.5   n/a MPO432686  
rotation period rot_per 8.197 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]

118267 (1998 HR56)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HR56 = 2003 FF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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