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172985 Ericmelin (2006 HW147)
Classification: Main-belt Asteroid          SPK-ID: 2172985
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982521247356731 7.5409e-08  
a 2.434320173992118 1.591e-08 au
q 1.951711027211267 1.8241e-07 au
i .5918208955671883 9.5281e-06 deg
node 287.5076586700338 0.00058717 deg
peri 53.36228035781718 0.00058806 deg
M 167.7677011542244 2.33e-05 deg
tp 2458353.996579330681
(2018-Aug-23.49657933)
9.0199e-05 TDB
period 1387.282711986392
3.80
1.36e-05
3.723e-08
d
yr
n .2595000982060326 2.544e-09 deg/d
Q 2.916929320772968 1.9064e-08 au
  Orbit Determination Parameters
   # obs. used (total)      94  
   data-arc span      7466 days (20.44 yr)  
   first obs. used      1999-08-17  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53336  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:56:57  

Additional Information
 Earth MOID = .943339 au 
 Jupiter MOID = 2.48078 au 
 T_jup = 3.478 
[ 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 18.1   n/a MPO459804  

172985 Ericmelin           Discovered 2006 Apr. 27 by M. W. Buie at Cerro Tololo.
Eric D. Melin (b. 1977) is a software engineer at the Johns Hopkins University Applied Physics Laboratory, and served as the Ground Systems Lead for the New Horizons Mission to Pluto.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

[ show close-approach data ]
Alternate Designations
 2006 HW147 = 2007 VG111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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