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117916 (4271 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117916
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628487901159901 4.8378e-08  
a 2.719907940934219 1.3561e-08 au
q 2.276974223526207 1.3383e-07 au
i 6.005299177694361 5.1834e-06 deg
node 194.6589304580282 3.721e-05 deg
peri 187.4934873182874 3.9462e-05 deg
M 97.58146797830578 1.2642e-05 deg
tp 2458556.385880439149
(2019-Mar-13.88588044)
5.6295e-05 TDB
period 1638.436952777253
4.49
1.2253e-05
3.355e-08
d
yr
n .2197216068581568 1.6432e-09 deg/d
Q 3.16284165834223 1.5769e-08 au
  Orbit Determination Parameters
   # obs. used (total)      717  
   data-arc span      21757 days (59.57 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5643  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:15:45  

Additional Information
 Earth MOID = 1.2801 au 
 Jupiter MOID = 2.29323 au 
 T_jup = 3.332 
[ 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 MPO412804  

117916 (4271 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 ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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