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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2225115588927921 5.8046e-08  
a 3.152667597990565 2.4679e-08 AU
q 2.45116261609089 1.8041e-07 AU
i 7.863581919837452 7.4876e-06 deg
node 314.78957108273 4.8583e-05 deg
peri 51.4452788158939 5.1196e-05 deg
M 40.55476384910406 1.6359e-05 deg
tp 2456770.167576145150
(2014-Apr-22.66757615)
9.2199e-05 JED
period 2044.634580940308
5.60
2.4008e-05
6.573e-08
d
yr
n .1760705816852806 2.0674e-09 deg/d
Q 3.854172579890239 3.0171e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      908  
   data-arc span      30745 days (84.18 yr)  
   first obs. used      1930-10-17  
   last obs. used      2014-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50211  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:09:56  

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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