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129099 Spoelhof (2004 XU3)
Classification: Main-belt Asteroid          SPK-ID: 2129099
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1789323054367208 9.671e-08  
a 3.078835782330766 6.7056e-08 AU
q 2.527932597737252 2.9732e-07 AU
i 7.493505382562591 1.0883e-05 deg
node 154.4412344084627 6.2184e-05 deg
peri 16.81654788271672 6.8002e-05 deg
M 224.7781360583083 3.3746e-05 deg
tp 2457741.678191568042
(2016-Dec-19.17819157)
0.00020307 JED
period 1973.232295330221
5.40
6.4464e-05
1.765e-07
d
yr
n .1824417737597153 5.9603e-09 deg/d
Q 3.62973896692428 7.9054e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      4896 days (13.40 yr)  
   first obs. used      2001-04-24  
   last obs. used      2014-09-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49671  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 17:46:28  

Additional Information
 Earth MOID = 1.53612 AU 
 T_jup = 3.191 
[ 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 15.2 mag n/a MPO270642  

129099 Spoelhof           Discovered 2004 Dec. 3 by L. Molnar at the Calvin-Rehoboth Observatory.
William Spoelhof (b. 1909) served as president of Calvin College from 1951 to 1976. Among his achievements at this Christian liberal arts college, he fostered the establishment of an astronomy program. This included the construction of an observatory in 1970.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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