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20340 Susanruder (1998 HR91)
Classification: Main-belt Asteroid          SPK-ID: 2020340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472311108792819 3.3245e-08  
a 2.378983374553906 8.7008e-09 au
q 2.028723009554992 7.6209e-08 au
i 2.987683567086965 3.3243e-06 deg
node 137.8660226954724 7.4756e-05 deg
peri 6.508582442212467 7.5985e-05 deg
M 119.6817160476847 1.3506e-05 deg
tp 2458754.935230393512
(2019-Sep-28.43523039)
4.954e-05 TDB
period 1340.249140431995
3.67
7.3526e-06
2.013e-08
d
yr
n .2686067755163515 1.4736e-09 deg/d
Q 2.72924373955282 9.9818e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      9748 days (26.69 yr)  
   first obs. used      1993-12-09  
   last obs. used      2020-08-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:31  

Additional Information
 Earth MOID = 1.04092 au 
 Jupiter MOID = 2.27776 au 
 T_jup = 3.523 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.54   n/a E2021B10  

20340 Susanruder           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Susan Ruder mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Carmel High School, Carmel, 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: 20040415/MPCPages.arcLast Updated: 2004-04-20

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