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JPL Small-Body Database Browser
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146290 (2001 HE9)
Classification: Main-belt Asteroid          SPK-ID: 2146290
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1348452874291958 4.2633e-08  
a 2.258926340616208 1.0128e-08 au
q 1.954320768934434 9.4806e-08 au
i 5.379563839475016 5.1548e-06 deg
node 74.99844938102986 5.6441e-05 deg
peri 191.4337793572045 6.0005e-05 deg
M 72.51164978890465 2.0588e-05 deg
tp 2458350.720485654550
(2018-Aug-20.22048565)
7.0754e-05 TDB
period 1240.08521977004
3.40
8.3397e-06
2.283e-08
d
yr
n .2903026294166767 1.9523e-09 deg/d
Q 2.563531912297982 1.1493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      9842 days (26.95 yr)  
   first obs. used      1992-11-27  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61031  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 12:58:06  

Additional Information
 Earth MOID = .938397 au 
 Jupiter MOID = 2.50448 au 
 T_jup = 3.603 
[ 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 16.4   n/a MPO449799  

146290 (2001 HE9)          Discovered 2001-Apr-16 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

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