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30211 Sheilah (2000 GN123)
Classification: Main-belt Asteroid          SPK-ID: 2030211
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299767917590128 3.6464e-08  
a 2.261466469768011 6.2869e-09 au
q 1.967528313356985 8.3607e-08 au
i 6.769892505487546 4.5843e-06 deg
node 175.1999689031759 2.7241e-05 deg
peri 231.8498914892193 3.1502e-05 deg
M 259.6238580158181 1.6889e-05 deg
tp 2459742.847179137044
(2022-Jun-12.34717914)
5.8856e-05 TDB
period 1242.177493821039
3.40
5.1799e-06
1.418e-08
d
yr
n .2898136552873863 1.2085e-09 deg/d
Q 2.555404626179038 7.104e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1776  
   data-arc span      10818 days (29.62 yr)  
   first obs. used      1991-11-10  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:42:09  

Additional Information
 Earth MOID = .983828 au 
 Jupiter MOID = 2.81946 au 
 T_jup = 3.599 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457168.5 (2015-May-26.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1292439423936296 3.6314e-08  
q 1.968935872137181 8.3113e-08 au
tp 2457258.826609220362
(2015-Aug-24.32660922)
5.6195e-05 TDB
node 175.2347586955264 2.7236e-05 deg
peri 231.7998893030432 3.1581e-05 deg
i 6.769503807924249 4.585e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1776  
   data-arc span      10818 days (29.62 yr)  
   first obs. used      1991-11-10  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:42:09  

Additional Information
 Jupiter MOID = 2.81946 au 
 T_jup = 3.599 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.318672357540533E-15 -3.011615741381817E-15 -8.781664667238455E-13 -2.611817007694426E-15 -2.419784820372665E-13 -1.124642689915249E-15
q -3.011615741381817E-15 6.907723002791109E-15 2.056024137696021E-12 5.916780897175333E-15 5.654822757580611E-13 2.738976026624648E-15
tp -8.781664667238455E-13 2.056024137696021E-12 3.15784632527189E-9 2.96807955633061E-12 9.053065195510726E-10 2.331057899836789E-12
node -2.611817007694426E-15 5.916780897175333E-15 2.96807955633061E-12 7.4179690350098E-10 -7.352248928014399E-10 1.552238663355521E-11
peri -2.419784820372665E-13 5.654822757580611E-13 9.053065195510726E-10 -7.352248928014399E-10 9.973616747228582E-10 -1.470648294170516E-11
i -1.124642689915249E-15 2.738976026624648E-15 2.331057899836789E-12 1.552238663355521E-11 -1.470648294170516E-11 2.102194998595314E-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 14.6   n/a MPO468094  
diameter diameter 3.320 km 0.614 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.271   0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

30211 Sheilah           Discovered 2000 Apr. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sheila Harrington mentored a finalist in the 2014 Broadcom MASTERS, a math and science competition for middle school students. She teaches at the Andover West Middle School, Andover, Massachusetts.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-01-05Last Updated: 2015-01-07

Alternate Designations
 2000 GN123 = 1998 XE90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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