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19439 Allisontjong (1998 FB91)
Classification: Main-belt Asteroid          SPK-ID: 2019439
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05848753094737099 4.326e-08  
a 2.590947703726822 1.2053e-08 au
q 2.43940956972208 1.0834e-07 au
i 7.263593992251193 3.9117e-06 deg
node 56.32858427351844 3.4269e-05 deg
peri 138.6608672405645 4.7881e-05 deg
M 144.1437950661678 3.3347e-05 deg
tp 2458590.570205167360
(2019-Apr-17.07020517)
0.00014074 TDB
period 1523.303351621599
4.17
1.0629e-05
2.91e-08
d
yr
n .2363285025380991 1.6491e-09 deg/d
Q 2.742485837731564 1.2758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1417  
   data-arc span      9772 days (26.75 yr)  
   first obs. used      1994-04-10  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52272  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:01  

Additional Information
 Earth MOID = 1.44065 au 
 Jupiter MOID = 2.22192 au 
 T_jup = 3.406 
[ 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 14.32   n/a E2021B10  
diameter diameter 6.895 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.065   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19439 Allisontjong           Discovered 1998 Mar. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Allison Krystle Weili Tjong (b. 1986) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her environmental science team project. She attends the Lake Brantley High School, Altamonte Springs, Florida, 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 FB91 = 2000 SV274 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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