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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2225115285003166 6.913e-08  
a 3.152667605953475 2.7175e-08 AU
q 2.451162718099333 2.2072e-07 AU
i 7.863579181156428 8.6921e-06 deg
node 314.7895640920288 4.9391e-05 deg
peri 51.44528955883763 5.2217e-05 deg
M 40.55475694808902 1.8965e-05 deg
tp 2456770.167614467095
(2014-Apr-22.66761447)
0.00010647 JED
period 2044.63458868672
5.60
2.6436e-05
7.238e-08
d
yr
n .1760705810182102 2.2765e-09 deg/d
Q 3.854172493807616 3.3222e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      854  
   data-arc span      30636 days (83.88 yr)  
   first obs. used      1930-10-17  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50857  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:46:59  

Additional Information
 Earth MOID = 1.45858 AU 
 T_jup = 3.154 
[ 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 12.1 mag n/a MPO275483  

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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