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117917 (4281 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117917
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2053849551674828 3.6028e-08  
a 3.073698586938441 2.3538e-08 au
q 2.442407140461734 1.111e-07 au
i 4.494981711421495 5.5613e-06 deg
node 2.958484962039721 5.6378e-05 deg
peri 87.43901047820646 5.8351e-05 deg
M 319.9590830796016 1.4529e-05 deg
tp 2459219.423234672127
(2021-Jan-04.92323467)
8.0528e-05 TDB
period 1968.295697090184
5.39
2.261e-05
6.19e-08
d
yr
n .1828993481681657 2.1009e-09 deg/d
Q 3.704990033415148 2.8372e-08 au
  Orbit Determination Parameters
   # obs. used (total)      587  
   data-arc span      21559 days (59.03 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53938  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 13:55:58  

Additional Information
 Earth MOID = 1.46403 au 
 Jupiter MOID = 1.54254 au 
 T_jup = 3.193 
[ 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 15.2   n/a MPO493673  
diameter diameter 4.289 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.105   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117917 (4281 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
 4281 P-L = 2000 DP75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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