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19473 Marygardner (1998 HE60)
Classification: Main-belt Asteroid          SPK-ID: 2019473
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08756102958338395 3.2512e-08  
a 2.410583809751978 8.8177e-09 au
q 2.199510609473059 7.663e-08 au
i 6.899390855241382 3.2601e-06 deg
node 246.9669371321751 3.9176e-05 deg
peri 201.2630368330892 4.7953e-05 deg
M 180.7728978907774 2.7351e-05 deg
tp 2460077.085922882233
(2023-May-12.58592288)
0.00010412 TDB
period 1367.041755148683
3.74
7.5008e-06
2.054e-08
d
yr
n .2633423585227983 1.4449e-09 deg/d
Q 2.621657010030898 9.5898e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1497  
   data-arc span      14526 days (39.77 yr)  
   first obs. used      1981-10-30  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48846  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:21:59  

Additional Information
 Earth MOID = 1.21719 au 
 Jupiter MOID = 2.55572 au 
 T_jup = 3.505 
[ 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 14.71   n/a E2021B10  
diameter diameter 3.290 km 0.441 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.236   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19473 Marygardner           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Mary Melissa Gardner (b. 1985) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her microbiology project. She attends the Spalding High School, Griffin, Georgia, 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 HE60 = 1981 UR8 = 1999 RA100 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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