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21504 Caseyfreeman (1998 KS19)
Classification: Main-belt Asteroid          SPK-ID: 2021504
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07040263760319068 3.8106e-08  
a 2.648963036018511 1.3395e-08 au
q 2.462469051369452 9.7701e-08 au
i 9.090715734197678 4.2477e-06 deg
node 194.0104578270368 2.1317e-05 deg
peri 216.4876016320937 3.3864e-05 deg
M 125.5503671205705 2.5861e-05 deg
tp 2458051.303500712377
(2017-Oct-24.80350071)
0.00011337 TDB
period 1574.752382473527
4.31
1.1944e-05
3.27e-08
d
yr
n .2286073696453366 1.734e-09 deg/d
Q 2.83545702066757 1.4338e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      13336 days (36.51 yr)  
   first obs. used      1982-11-05  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49345  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:00:18  

Additional Information
 Earth MOID = 1.47685 au 
 Jupiter MOID = 2.44476 au 
 T_jup = 3.370 
[ 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 13.5   n/a MPO337440  
diameter diameter 5.291 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 44.568 h n/a LCDB (Rev. 2019-January); 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 0.437   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21504 Caseyfreeman           Discovered 1998 May 22 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Casey Jo Freeman (b. 1987) was awarded first place in the 2006 Intel International Science and Engineering Fair for her biochemistry project. She attends the Mid-Buchanan High School, Faucett, Missouri, 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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