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312570 (2009 HT38)
Classification: Main-belt Asteroid          SPK-ID: 2312570
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09952758228879033 6.207e-08  
a 2.51612062949773 2.2908e-08 au
q 2.265697226496872 1.5547e-07 au
i 9.097067929566299 6.1168e-06 deg
node 106.7109004925596 4.3678e-05 deg
peri 86.68411486654448 5.6265e-05 deg
M 304.4737568865916 3.6691e-05 deg
tp 2459225.349229714459
(2021-Jan-10.84922971)
0.00014988 TDB
period 1457.792174627759
3.99
1.9908e-05
5.451e-08
d
yr
n .2469487806737091 3.3724e-09 deg/d
Q 2.766544032498588 2.5187e-08 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      6873 days (18.82 yr)  
   first obs. used      2001-03-31  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:46:57  

Additional Information
 Earth MOID = 1.28721 au 
 Jupiter MOID = 2.24496 au 
 T_jup = 3.434 
[ 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 16.7   n/a MPO413278  

312570 (2009 HT38)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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