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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1302165197434722 4.0195e-08  
a 2.26067842617662 6.4801e-09 au
q 1.966300749260751 9.1319e-08 au
i 6.769666126696903 5.2874e-06 deg
node 175.2125459589558 2.7798e-05 deg
peri 231.969629548197 3.2468e-05 deg
M 202.6685770446049 1.727e-05 deg
tp 2459743.087246441188
(2022-Jun-12.58724644)
6.0285e-05 TDB
period 1241.528265934555
3.40
5.3382e-06
1.462e-08
d
yr
n .2899652064941199 1.2468e-09 deg/d
Q 2.55505610309249 7.3239e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1678  
   data-arc span      10450 days (28.61 yr)  
   first obs. used      1991-11-10  
   last obs. used      2020-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49971  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:32:29  

Additional Information
 Earth MOID = .982276 au 
 Jupiter MOID = 2.81884 au 
 T_jup = 3.600 
[ 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 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

[ show close-approach data ]
Alternate Designations
 2000 GN123 = 1998 XE90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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