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21468 Saylor (1998 HD97)
Classification: Main-belt Asteroid          SPK-ID: 2021468
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 .1066010449895247 3.4593e-08  
a 2.678082430674268 1.0615e-08 au
q 2.392596044996304 9.5219e-08 au
i 3.333847669894297 3.8873e-06 deg
node 55.23693959703505 5.7191e-05 deg
peri 219.87440090031 6.0168e-05 deg
M 14.19305669361217 1.7967e-05 deg
tp 2459137.388605821541
(2020-Oct-14.88860582)
7.9958e-05 TDB
period 1600.789906974068
4.38
9.5176e-06
2.606e-08
d
yr
n .2248889741443328 1.3371e-09 deg/d
Q 2.963568816352231 1.1747e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1679  
   data-arc span      8652 days (23.69 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52712  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:56:52  

Additional Information
 Earth MOID = 1.37562 au 
 Jupiter MOID = 2.12686 au 
 T_jup = 3.367 
[ 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 14.50   n/a E2020-QM5  
diameter diameter 3.875 km 0.550 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.204   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21468 Saylor           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Charlotte Saylor mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Baltimore Polytechnic Institute, Baltimore, Maryland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

[ show close-approach data ]
Alternate Designations
 1998 HD97 = 1999 RV183 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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