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16998 Estelleweber (1999 CG46)
Classification: Main-belt Asteroid          SPK-ID: 2016998
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04471841878998827 3.4781e-08  
a 2.25907948597682 7.7488e-09 au
q 2.158057023443037 7.5841e-08 au
i 5.500335587182431 3.4667e-06 deg
node 144.8043185857498 3.2893e-05 deg
peri 12.87675284962308 4.972e-05 deg
M 205.3194394827994 3.7398e-05 deg
tp 2459929.379399323431
(2022-Dec-15.87939932)
0.00012934 TDB
period 1240.211330467106
3.40
6.381e-06
1.747e-08
d
yr
n .2902731100387638 1.4935e-09 deg/d
Q 2.360101948510602 8.0953e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1659  
   data-arc span      11512 days (31.52 yr)  
   first obs. used      1989-03-06  
   last obs. used      2020-09-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51168  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:05:39  

Additional Information
 Earth MOID = 1.16839 au 
 Jupiter MOID = 2.60904 au 
 T_jup = 3.614 
[ 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 14.86   n/a MPCxxxxx  
diameter diameter 3.460 km 0.292 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16998 Estelleweber           Discovered 1999 Feb. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Estelle Lela Weber (b. 1986) was awarded second place in the 2003 Intel International Science and Engineering Fair for her environmental science project. She attends the Wollumbin High School, Murwillumbah, Queensland, Australia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 1999 CG46 = 1989 EF7 = 1994 WP7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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