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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584883896818643 3.3046e-08  
a 2.212871547002694 7.2681e-09 au
q 1.862157098945421 7.5658e-08 au
i 5.44259108785943 3.4031e-06 deg
node 250.3685003714857 3.599e-05 deg
peri 20.95162180282682 3.7629e-05 deg
M 308.1807890606082 1.0864e-05 deg
tp 2459569.569695171243
(2021-Dec-21.06969517)
3.6438e-05 TDB
period 1202.355055821286
3.29
5.9236e-06
1.622e-08
d
yr
n .2994123892580937 1.4751e-09 deg/d
Q 2.563585995059967 8.42e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1231  
   data-arc span      12161 days (33.30 yr)  
   first obs. used      1988-02-21  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51029  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:11:45  

Additional Information
 Earth MOID = .847131 au 
 Jupiter MOID = 2.52577 au 
 T_jup = 3.633 
[ 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 15.45   n/a MPCxxxxx  

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

Alternate Designations
 1999 TR150 = 1988 DY2 = 1996 XS28 = 1998 FP96 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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