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117915 (4227 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117915
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17782154290625 5.153e-08  
a 2.212543177602682 7.2046e-09 au
q 1.819105336014676 1.1651e-07 au
i 2.051679630701692 5.402e-06 deg
node 306.9781442631387 0.00012441 deg
peri 20.098887369301 0.0001253 deg
M 74.56386767580594 1.2582e-05 deg
tp 2458751.521420297788
(2019-Sep-25.02142030)
4.2026e-05 TDB
period 1202.087438415964
3.29
5.8715e-06
1.608e-08
d
yr
n .2994790466111065 1.4628e-09 deg/d
Q 2.605981019190688 8.4858e-09 au
  Orbit Determination Parameters
   # obs. used (total)      369  
   data-arc span      21587 days (59.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58483  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 13:55:58  

Additional Information
 Earth MOID = .807635 au 
 Jupiter MOID = 2.72051 au 
 T_jup = 3.634 
[ 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 17.2   n/a MPO436566  

117915 (4227 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 4227 P-L = 2003 WM6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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