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19428 Gracehsu (1998 FU66)
Classification: Main-belt Asteroid          SPK-ID: 2019428
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08460944077732009 3.5659e-08  
a 2.705677417357091 1.1984e-08 au
q 2.476751564150684 9.8503e-08 au
i 6.066397427938358 4.0698e-06 deg
node 173.3977537581072 3.2576e-05 deg
peri 187.1193437774355 3.875e-05 deg
M 274.2119730998644 2.1973e-05 deg
tp 2459783.879496819193
(2022-Jul-23.37949682)
9.9872e-05 TDB
period 1625.595364458593
4.45
1.08e-05
2.957e-08
d
yr
n .2214573244184284 1.4713e-09 deg/d
Q 2.934603270563498 1.2998e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1567  
   data-arc span      15081 days (41.29 yr)  
   first obs. used      1980-03-23  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50039  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:01:16  

Additional Information
 Earth MOID = 1.47248 au 
 Jupiter MOID = 2.46326 au 
 T_jup = 3.352 
[ 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 14.39   n/a E2021B10  
diameter diameter 4.091 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.14349 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.242   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19428 Gracehsu           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Grace Hsu (b. 1986) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her environmental science project. She attends the Saratoga High School, Saratoga, 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: 20040830/MPCPages.arcLast Updated: 2004-09-06

Alternate Designations
 1998 FU66 = 1980 FG8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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