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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .192629859553772 2.7878e-08  
a 2.587920332350765 1.0119e-08 au
q 2.089409602193686 7.007e-08 au
i 7.415183649796472 5.559e-06 deg
node 166.5498842598698 2.6108e-05 deg
peri 124.5135972848382 3.1115e-05 deg
M 65.22095902793488 1.5335e-05 deg
tp 2458925.007702656630
(2020-Mar-16.50770266)
6.4706e-05 TDB
period 1520.634294891835
4.16
8.919e-06
2.442e-08
d
yr
n .236743312451471 1.3886e-09 deg/d
Q 3.086431062507844 1.2069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1344  
   data-arc span      9303 days (25.47 yr)  
   first obs. used      1995-08-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46358  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:51  

Additional Information
 Earth MOID = 1.08219 au 
 Jupiter MOID = 2.15219 au 
 T_jup = 3.383 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457653.5 (2016-Sep-22.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1921448070186384 2.7898e-08  
q 2.091630666987047 7.0197e-08 au
tp 2457404.820827072826
(2016-Jan-17.32082707)
6.547e-05 TDB
node 166.5967061711832 2.6116e-05 deg
peri 124.756483834515 3.1152e-05 deg
i 7.412898493717551 5.5584e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1344  
   data-arc span      9303 days (25.47 yr)  
   first obs. used      1995-08-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46358  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:51  

Additional Information
 Jupiter MOID = 2.15219 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.783132313518815E-16 -1.946148271063476E-15 6.322139970038391E-13 -2.771415354249628E-15 1.641173983672242E-13 2.134740088083875E-16
q -1.946148271063476E-15 4.927659587119578E-15 -1.704529495682621E-12 8.258843484830072E-15 -4.408909862531533E-13 -1.17591107492473E-16
tp 6.322139970038391E-13 -1.704529495682621E-12 4.286277525011268E-9 -1.845663834974151E-11 1.123545625401532E-9 9.781548909133592E-13
node -2.771415354249628E-15 8.258843484830072E-15 -1.845663834974151E-11 6.820478975847298E-10 -6.80327101706532E-10 6.85675607192507E-11
peri 1.641173983672242E-13 -4.408909862531533E-13 1.123545625401532E-9 -6.80327101706532E-10 9.70418389306354E-10 -6.764433061484559E-11
i 2.134740088083875E-16 -1.17591107492473E-16 9.781548909133592E-13 6.85675607192507E-11 -6.764433061484559E-11 3.089566756011243E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.75   n/a E2021B10  
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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