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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226018973359518 7.1397e-08  
a 3.152889214781887 2.4946e-08 AU
q 2.45105009348138 2.2556e-07 AU
i 7.863544888899399 9.0265e-06 deg
node 314.7897510287233 5.1578e-05 deg
peri 51.42873189815639 5.4423e-05 deg
M 5.348779116766381 1.8936e-05 deg
tp 2456770.118189113848
(2014-Apr-22.61818911)
0.00010741 JED
period 2044.850176132724
5.60
2.4269e-05
6.644e-08
d
yr
n .1760520179922627 2.0894e-09 deg/d
Q 3.854728336082395 3.0499e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      842  
   data-arc span      30327 days (83.03 yr)  
   first obs. used      1930-10-17  
   last obs. used      2013-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56209  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Nov-21 02:41:52  

Additional Information
 Earth MOID = 1.45701 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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