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344861 (2004 HP38)
Classification: Mars-crossing Asteroid          SPK-ID: 2344861
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3411980339402057 4.8155e-08  
a 2.407280407146861 7.3341e-09 au
q 1.585921065085574 1.1508e-07 au
i 6.586139726418393 5.1144e-06 deg
node 126.5976266435258 6.0021e-05 deg
peri 135.5836680256025 6.0991e-05 deg
M 93.043168812833 8.4351e-06 deg
tp 2458647.909634775272
(2019-Jun-13.40963478)
3.1572e-05 TDB
period 1364.232679308692
3.74
6.2344e-06
1.707e-08
d
yr
n .2638846037484057 1.2059e-09 deg/d
Q 3.228639749208147 9.8364e-09 au
  Orbit Determination Parameters
   # obs. used (total)      309  
   data-arc span      5699 days (15.60 yr)  
   first obs. used      2004-03-18  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55531  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 23:07:00  

Additional Information
 Earth MOID = .578743 au 
 Jupiter MOID = 1.89076 au 
 T_jup = 3.432 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456883.5 (2014-Aug-14.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3408082648735322 4.8189e-08  
q 1.588336448922614 1.152e-07 au
tp 2457282.982737363080
(2015-Sep-17.48273736)
3.1069e-05 TDB
node 126.6237724867758 6.0024e-05 deg
peri 135.4639764626627 6.0993e-05 deg
i 6.583829783533215 5.1115e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      309  
   data-arc span      5699 days (15.60 yr)  
   first obs. used      2004-03-18  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55531  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 23:07:00  

Additional Information
 Jupiter MOID = 1.89076 au 
 T_jup = 3.432 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.322133726292042E-15 -5.54658515434535E-15 -1.236161360024732E-13 -1.380695936043177E-13 2.084842213266008E-13 -1.516829092311387E-14
q -5.54658515434535E-15 1.327119162891135E-14 3.043450543020456E-13 3.211586828448193E-13 -4.911916519926668E-13 3.557799587254729E-14
tp -1.236161360024732E-13 3.043450543020456E-13 9.652604076960311E-10 1.034622332732187E-11 3.535322134209941E-10 5.694705533506245E-12
node -1.380695936043177E-13 3.211586828448193E-13 1.034622332732187E-11 3.602852620912765E-9 -3.581154255470347E-9 7.629858509419288E-11
peri 2.084842213266008E-13 -4.911916519926668E-13 3.535322134209941E-10 -3.581154255470347E-9 3.720104243808551E-9 -7.429422081507952E-11
i -1.516829092311387E-14 3.557799587254729E-14 5.694705533506245E-12 7.629858509419288E-11 -7.429422081507952E-11 2.612763264144479E-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 17.2   n/a MPO476593  

344861 (2004 HP38)          Discovered 2004-Apr-23 by CSS at Catalina
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

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