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20559 Sheridanlamp (1999 RJ118)
Classification: Main-belt Asteroid          SPK-ID: 2020559
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1928691335811835 2.8305e-08  
a 2.58881250141602 1.0251e-08 au
q 2.089510477263776 7.1427e-08 au
i 7.414145136290421 5.6181e-06 deg
node 166.5506733048739 2.6388e-05 deg
peri 124.5660354857751 3.1408e-05 deg
M 17.82324178645435 1.5327e-05 deg
tp 2458925.175974709183
(2020-Mar-16.67597471)
6.4757e-05 TDB
period 1521.42070615362
4.17
9.0362e-06
2.474e-08
d
yr
n .2366209415606904 1.4054e-09 deg/d
Q 3.088114525568264 1.2228e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1278  
   data-arc span      9200 days (25.19 yr)  
   first obs. used      1995-08-24  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46724  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:06  

Additional Information
 Earth MOID = 1.0842 au 
 Jupiter MOID = 2.15153 au 
 T_jup = 3.383 
[ 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 14.7   n/a MPO474035  
diameter diameter 3.645 km 0.770 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.175   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20559 Sheridanlamp           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sheridan Lamp mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. She teaches at the Vernon Middle School, Vernon, Texas.
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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