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136897 (1998 HJ41)
Classification: Amor [NEO]          SPK-ID: 2136897
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 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247709235204155 8.4553e-08  
a 1.36338529162669 3.9437e-09 au
q 1.193274449676277 1.136e-07 au
i 38.87605326207498 1.6354e-05 deg
node 211.8661011726646 8.4602e-06 deg
peri 120.0942397738376 3.6471e-05 deg
M 224.0776918005753 3.6134e-05 deg
tp 2459220.040462003058
(2021-Jan-05.54046200)
5.8893e-05 TDB
period 581.468688753739
1.59
2.5229e-06
6.907e-09
d
yr
n .6191219010804992 2.6863e-09 deg/d
Q 1.533496133577103 4.4358e-09 au
  Orbit Determination Parameters
   # obs. used (total)      313  
   data-arc span      6960 days (19.06 yr)  
   first obs. used      1998-04-28  
   last obs. used      2017-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53902  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-May-18 06:21:13  

Additional Information
 Earth MOID = .264389 au 
 Jupiter MOID = 3.69623 au 
 T_jup = 4.607 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456443.5 (2013-May-31.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247490146836515 8.4585e-08  
q 1.193297867243416 1.1366e-07 au
tp 2456312.748896478710
(2013-Jan-20.24889648)
5.2782e-05 TDB
node 211.8892672596063 8.4615e-06 deg
peri 120.0949988562486 3.645e-05 deg
i 38.87609587561682 1.6355e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      313  
   data-arc span      6960 days (19.06 yr)  
   first obs. used      1998-04-28  
   last obs. used      2017-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53902  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-May-18 06:21:13  

Additional Information
 Jupiter MOID = 3.69623 au 
 T_jup = 4.607 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.154676215504516E-15 -9.610396992309651E-15 2.91600950182185E-12 9.43469982790216E-14 2.005178905489649E-12 -4.768389625685468E-13
q -9.610396992309651E-15 1.291800364520914E-14 -3.90576863579653E-12 -1.281786168786131E-13 -2.683958937935277E-12 6.430900342181323E-13
tp 2.91600950182185E-12 -3.90576863579653E-12 2.785899526795779E-9 4.391886659984791E-11 1.878058934552875E-9 -1.292427250194778E-10
node 9.43469982790216E-14 -1.281786168786131E-13 4.391886659984791E-11 7.159720382606697E-11 -2.252143641431004E-11 -2.410710447592715E-11
peri 2.005178905489649E-12 -2.683958937935277E-12 1.878058934552875E-9 -2.252143641431004E-11 1.328573348472415E-9 -8.028751733468604E-11
i -4.768389625685468E-13 6.430900342181323E-13 -1.292427250194778E-10 -2.410710447592715E-11 -8.028751733468604E-11 2.674786611474973E-10

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 18.5   n/a MPO320507  
rotation period rot_per 15.3 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:
[Warner, B.D. (2015) Minor Planet Bull. 42, 115-127.]

136897 (1998 HJ41)          Discovered 1998-Apr-28 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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