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117912 (4171 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117912
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607702017932325 3.6359e-08  
a 2.283098459258671 8.1936e-09 au
q 1.916044259249837 8.434e-08 au
i 3.330250507125983 4.2246e-06 deg
node 246.5847058732174 7.0451e-05 deg
peri 101.2636259624575 7.2113e-05 deg
M 120.3351698149652 1.4567e-05 deg
tp 2458579.312510661164
(2019-Apr-05.81251066)
5.0251e-05 TDB
period 1260.043064676211
3.45
6.7831e-06
1.857e-08
d
yr
n .2857045208153326 1.538e-09 deg/d
Q 2.650152659267506 9.5109e-09 au
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      21675 days (59.34 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53627  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:51:46  

Additional Information
 Earth MOID = .912825 au 
 Jupiter MOID = 2.76892 au 
 T_jup = 3.584 
[ 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 16.6   n/a MPO417614  

117912 (4171 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
 4171 P-L = 2004 KD12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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