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21439 Robenzing (1998 FN123)
Classification: Main-belt Asteroid          SPK-ID: 2021439
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1146874434324187 3.5641e-08  
a 2.343510530370525 8.3319e-09 au
q 2.074739298985378 8.3179e-08 au
i 3.556764708282709 3.9184e-06 deg
node 335.3751352656841 6.366e-05 deg
peri 79.41147255392845 6.6171e-05 deg
M 242.0216676682591 1.8585e-05 deg
tp 2459629.936093082788
(2022-Feb-19.43609308)
6.8649e-05 TDB
period 1310.384631265134
3.59
6.9882e-06
1.913e-08
d
yr
n .2747284968173289 1.4651e-09 deg/d
Q 2.612281761755672 9.2874e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      21820 days (59.74 yr)  
   first obs. used      1960-10-17  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56108  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:45:37  

Additional Information
 Earth MOID = 1.08877 au 
 Jupiter MOID = 2.68705 au 
 T_jup = 3.551 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.61   n/a E2021B10  
diameter diameter 2.191 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.279   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21439 Robenzing           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Benzing mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Hendrick Hudson High School, Montrose, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

Alternate Designations
 1998 FN123 = 9050 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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