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30221 LeDonne (2000 GX126)
Classification: Main-belt Asteroid          SPK-ID: 2030221
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1649960249997552 4.0388e-08  
a 2.296638909057816 7.4514e-09 au
q 1.917702618203502 9.2594e-08 au
i 8.314085689619766 4.1341e-06 deg
node 140.3629460887171 2.5305e-05 deg
peri 51.10100952309621 2.7316e-05 deg
M 14.28601342422798 1.0562e-05 deg
tp 2459150.051755600969
(2020-Oct-27.55175560)
3.7229e-05 TDB
period 1271.269138866343
3.48
6.1869e-06
1.694e-08
d
yr
n .2831815773653019 1.3782e-09 deg/d
Q 2.675575199912131 8.6808e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1502  
   data-arc span      14233 days (38.97 yr)  
   first obs. used      1982-01-30  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50991  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:32:38  

Additional Information
 Earth MOID = .930751 au 
 Jupiter MOID = 2.30047 au 
 T_jup = 3.562 
[ 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 14.68   n/a E2021B10  
diameter diameter 2.970 km 0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 41.0563 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.194   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30221 LeDonne           Discovered 2000 Apr. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sarah LeDonne mentored a finalist in the 2014 Broadcom MASTERS, a math and science competition for middle school students. She teaches at the Ingomar Middle School, Pittsburgh, Pennsylvania.
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 GX126 = 1982 BR14 = 1989 ET6 = 1996 DR4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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