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21856 Heathermaria (1999 TR150)
Classification: Main-belt Asteroid          SPK-ID: 2021856
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 .1585191619031109 3.5396e-08  
a 2.21320615943531 7.8743e-09 au
q 1.862370573922822 7.9854e-08 au
i 5.442481355297941 4.1086e-06 deg
node 250.3750887668102 3.664e-05 deg
peri 20.8921617953497 3.8412e-05 deg
M 249.5599469585844 1.0859e-05 deg
tp 2459569.439655541900
(2021-Dec-20.93965554)
3.6523e-05 TDB
period 1202.627781655232
3.29
6.4182e-06
1.757e-08
d
yr
n .2993444900337454 1.5975e-09 deg/d
Q 2.564041744947799 9.1225e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1030  
   data-arc span      12021 days (32.91 yr)  
   first obs. used      1988-02-21  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53037  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:45  

Additional Information
 Earth MOID = .84563 au 
 Jupiter MOID = 2.52635 au 
 T_jup = 3.633 
[ 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 15.42   n/a E2021B10  

21856 Heathermaria           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Heather Maria Foster (b. 1990) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her botany & zoology project. She attends the Citrus Springs Middle School, Citrus Springs, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 TR150 = 1988 DY2 = 1996 XS28 = 1998 FP96 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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