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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2213628187234357 5.2935e-08  
a 3.160370065313554 2.3574e-08 au
q 2.460781639446577 1.6095e-07 au
i 7.844548634550705 6.8717e-06 deg
node 314.7566135686708 3.6954e-05 deg
peri 52.09282831981375 3.9395e-05 deg
M 145.4048411669555 1.5072e-05 deg
tp 2456771.639007054388
(2014-Apr-24.13900705)
8.2516e-05 JED
period 2052.132205954583
5.62
2.2961e-05
6.286e-08
d
yr
n .175427294087293 1.9628e-09 deg/d
Q 3.859958491180531 2.8792e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1282  
   data-arc span      31219 days (85.47 yr)  
   first obs. used      1930-10-17  
   last obs. used      2016-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47986  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:50:11  

Additional Information
 Earth MOID = 1.46729 au 
 Jupiter MOID = 1.6796 au 
 T_jup = 3.152 
[ 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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