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21714 Geoffreywoo (1999 RX109)
Classification: Main-belt Asteroid          SPK-ID: 2021714
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03345443720936001 1.1052e-08  
a 2.897097501393871 1.1837e-08 au
q 2.800176734944096 3.1745e-08 au
i 11.77759765645436 7.6023e-07 deg
node 305.8267025348213 1.738e-06 deg
peri 158.568058053928 4.3455e-05 deg
M 21.98284247745033 4.1232e-05 deg
tp 2459090.517283733024
(2020-Aug-29.01728373)
0.00020629 TDB
period 1801.121847492017
4.93
1.1038e-05
3.022e-08
d
yr
n .1998754279180413 1.2249e-09 deg/d
Q 2.994018267843646 1.2233e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2751  
   data-arc span      16967 days (46.45 yr)  
   first obs. used      1974-09-22  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 03:03:32  

Additional Information
 Earth MOID = 1.81915 au 
 Jupiter MOID = 2.08535 au 
 T_jup = 3.256 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.81   n/a E2021B10  
diameter diameter 8.268 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.162 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.258   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21714 Geoffreywoo           Discovered 1999 Sept. 8 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Geoffrey Hubert Woo (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his physics project. He attends the Palos Verdes Peninsula High School, Rolling Hills Estates, California, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1999 RX109 = 1974 SO3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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