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78383 Philmassey (2002 PM137)
Classification: Main-belt Asteroid          SPK-ID: 2078383
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06207190145860699 4.2809e-08  
a 2.707132024990011 1.4963e-08 au
q 2.539095192699392 1.2015e-07 au
i 5.162660300039316 6.9005e-06 deg
node 349.7297506979788 4.0508e-05 deg
peri 62.60613962781029 6.7419e-05 deg
M 283.4655015358862 5.2519e-05 deg
tp 2459346.373526123336
(2021-May-11.87352612)
0.00023738 TDB
period 1626.90645268662
4.45
1.3489e-05
3.693e-08
d
yr
n .2212788568178016 1.8346e-09 deg/d
Q 2.87516885728063 1.5892e-08 au
  Orbit Determination Parameters
   # obs. used (total)      607  
   data-arc span      10848 days (29.70 yr)  
   first obs. used      1991-02-08  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55962  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:27:05  

Additional Information
 Earth MOID = 1.55429 au 
 Jupiter MOID = 2.34036 au 
 T_jup = 3.356 
[ 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 15.5   n/a MPO436330  

78383 Philmassey           Discovered 2002 Aug. 15 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Philip Massey (b. 1952), an astronomer at Lowell Observatory, studies massive stars, young clusters, the initial mass function, and star formation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

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