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44597 Thoreau (1999 PW)
Classification: Main-belt Asteroid          SPK-ID: 2044597
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183859895660011 4.4137e-08  
a 2.253416312137948 9.3925e-09 au
q 1.986643392121328 1e-07 au
i 5.043388129233928 5.0859e-06 deg
node 208.4666465782351 4.864e-05 deg
peri 7.253714147178032 5.2522e-05 deg
M 147.286153549168 2.2355e-05 deg
tp 2458495.001353267043
(2019-Jan-11.50135327)
7.5178e-05 TDB
period 1235.5507183716
3.38
7.7248e-06
2.115e-08
d
yr
n .2913680471769411 1.8217e-09 deg/d
Q 2.520189232154567 1.0504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      994  
   data-arc span      8280 days (22.67 yr)  
   first obs. used      1998-02-23  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:56:22  

Additional Information
 Earth MOID = .979918 au 
 Jupiter MOID = 2.44661 au 
 T_jup = 3.611 
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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 15.4   n/a MPO432002  

44597 Thoreau           Discovered 1999 Aug. 6 by J. Ticha and M. Tichy at Klet.
Henry David Thoreau (1817-1862) was an essayist and naturalist who took the naturalist beliefs of transcendentalism out of the realm of theory into practice and built himself a rustic cabin on the shores of Walden Pond near Concord, Massachusetts. His memoir of this experience is Walden, or Life in the Woods.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02

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