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4961 Timherder (1958 TH1)
Classification: Main-belt Asteroid          SPK-ID: 2004961
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2221972181981141 5.4399e-08  
a 3.15627772989299 2.3701e-08 au
q 2.454961598450109 1.6652e-07 au
i 7.859456535350236 6.9571e-06 deg
node 314.7945807467136 4.5983e-05 deg
peri 51.74031446988037 4.8588e-05 deg
M 110.6497975816031 1.585e-05 deg
tp 2456770.980240433071
(2014-Apr-23.48024043)
8.8248e-05 JED
period 2048.147564634803
5.61
2.307e-05
6.316e-08
d
yr
n .1757685853383275 1.9798e-09 deg/d
Q 3.857593861335871 2.8968e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1087  
   data-arc span      31106 days (85.16 yr)  
   first obs. used      1930-10-17  
   last obs. used      2015-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47862  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:54:23  

Additional Information
 Earth MOID = 1.46063 au 
 Jupiter MOID = 1.68067 au 
 T_jup = 3.153 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2 mag n/a MPO358678  

4961 Timherder           Discovered 1958 Oct. 8 at the Lowell Observatory.
Timothy Scott Herder (b. 1955) is the deputy project manager of NASA's New Horizons-Pluto Kuiper Belt mission. As such, he has helped further the exploration of the planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

[ show close-approach data ]
Alternate Designations
 1958 TH1 = 1930 UU = 1969 TQ3 = 1980 RY2 = 1982 BM3 = 1988 BE2 = 1991 QA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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