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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1925216726359968 2.7884e-08  
a 2.588062931843611 1.0088e-08 au
q 2.089804727317857 7.0049e-08 au
i 7.415049678666455 5.5583e-06 deg
node 166.5481711850185 2.6101e-05 deg
peri 124.5328511286693 3.1117e-05 deg
M 111.6142681031447 1.5366e-05 deg
tp 2458925.004132503543
(2020-Mar-16.50413250)
6.4755e-05 TDB
period 1520.759981527327
4.16
8.8919e-06
2.434e-08
d
yr
n .2367237462669457 1.3841e-09 deg/d
Q 3.086321136369365 1.203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1346  
   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      .46931  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:23:59  

Additional Information
 Earth MOID = 1.08411 au 
 Jupiter MOID = 2.15132 au 
 T_jup = 3.383 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457655.5 (2016-Sep-24.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1921455022327937 2.7897e-08  
q 2.091629719375799 7.0192e-08 au
tp 2457404.821001788384
(2016-Jan-17.32100179)
6.5467e-05 TDB
node 166.5966966940504 2.6109e-05 deg
peri 124.7564977321885 3.1146e-05 deg
i 7.412896345573081 5.5579e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1346  
   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      .46931  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:23:59  

Additional Information
 Jupiter MOID = 2.15132 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.782195751540602E-16 -1.945886163747159E-15 6.323067917345967E-13 -2.774612216408584E-15 1.641317211005677E-13 2.120383004098097E-16
q -1.945886163747159E-15 4.926921690767219E-15 -1.704813993103185E-12 8.265857164099903E-15 -4.409350313844396E-13 -1.141290638056251E-16
tp 6.323067917345967E-13 -1.704813993103185E-12 4.285925639949528E-9 -1.84594553447065E-11 1.123476309560387E-9 9.718978143850623E-13
node -2.774612216408584E-15 8.265857164099903E-15 -1.84594553447065E-11 6.816867074071831E-10 -6.799699591332246E-10 6.853938221093661E-11
peri 1.641317211005677E-13 -4.409350313844396E-13 1.123476309560387E-9 -6.799699591332246E-10 9.700495645402162E-10 -6.761802418616332E-11
i 2.120383004098097E-16 -1.141290638056251E-16 9.718978143850623E-13 6.853938221093661E-11 -6.761802418616332E-11 3.088994617335329E-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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