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17031 Piethut (1999 FL9)
Classification: Main-belt Asteroid          SPK-ID: 2017031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174094194044378 1.7349e-08  
a 2.393734063430151 7.473e-09 au
q 2.112687136834191 4.1462e-08 au
i 7.899982534955819 9.0801e-07 deg
node 156.7213123257313 1.5288e-06 deg
peri 234.0884810467575 9.3515e-06 deg
M 98.99483798140264 8.3091e-06 deg
tp 2458828.517657299281
(2019-Dec-11.01765730)
3.1096e-05 TDB
period 1352.733598063125
3.70
6.3346e-06
1.734e-08
d
yr
n .2661277878478484 1.2462e-09 deg/d
Q 2.67478099002611 8.3504e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2228  
   data-arc span      9507 days (26.03 yr)  
   first obs. used      1995-02-24  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46676  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 01:23:22  

Additional Information
 Earth MOID = 1.1264 au 
 Jupiter MOID = 2.76808 au 
 T_jup = 3.508 
[ 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 13.98   n/a E2021B10  
diameter diameter 4.582 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.279   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17031 Piethut           Discovered 1999 Mar. 22 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Piet Hut (b. 1952) is a professor of astrophysics at the Institute for Advanced Study, Princeton, N.J. He has researched the dynamics of star clusters and comet clouds. Hut is a cofounder of the B612 Foundation, whose goal is to produce a significant alteration in the orbit of a minor planet in a controlled manner.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041126/MPCPages.arcLast Updated: 2004-12-06

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Alternate Designations
 1999 FL9 = 1995 DA12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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