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20544 Kimhansell (1999 RG100)
Classification: Main-belt Asteroid          SPK-ID: 2020544
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07746527770422446 3.4319e-08  
a 2.32540273658192 8.7469e-09 au
q 2.145264767818438 7.9612e-08 au
i 8.826898454740205 4.1507e-06 deg
node 133.0235800289921 2.5882e-05 deg
peri 326.1412974819523 3.9863e-05 deg
M 240.3253376578456 3.2196e-05 deg
tp 2459631.071624648386
(2022-Feb-20.57162465)
0.00011672 TDB
period 1295.226423369816
3.55
7.3079e-06
2.001e-08
d
yr
n .2779436811236302 1.5682e-09 deg/d
Q 2.505540705345402 9.4245e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1206  
   data-arc span      12245 days (33.52 yr)  
   first obs. used      1987-02-02  
   last obs. used      2020-08-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:36  

Additional Information
 Earth MOID = 1.16745 au 
 Jupiter MOID = 2.58512 au 
 T_jup = 3.555 
[ 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 15.27   n/a E2021B10  
diameter diameter 2.425 km 0.540 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20544 Kimhansell           Discovered 1999 Sept. 8 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kim Hansell mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. She teaches at the Pine Valley Middle School, San Ramon, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RG100 = 1987 CB = 1998 HS108 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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