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JPL Small-Body Database Browser
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109904 (2001 ST21)
Classification: Main-belt Asteroid          SPK-ID: 2109904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1486217486544501 2.8351e-08  
a 2.538413829920095 1.1481e-08 au
q 2.161150327708731 6.9916e-08 au
i 4.760652441151325 3.2087e-06 deg
node 84.76698302501575 0.00011142 deg
peri .2917812572570807 0.00011875 deg
M 69.80827735396294 4.4308e-05 deg
tp 2458314.051544380128
(2018-Jul-14.55154438)
0.00018145 TDB
period 1477.209407421363
4.04
1.0022e-05
2.744e-08
d
yr
n .2437027534426692 1.6534e-09 deg/d
Q 2.915677332131459 1.3187e-08 au
  Orbit Determination Parameters
   # obs. used (total)      828  
   data-arc span      7321 days (20.04 yr)  
   first obs. used      1999-04-12  
   last obs. used      2019-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5699  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:33:04  

Additional Information
 Earth MOID = 1.17729 au 
 Jupiter MOID = 2.29459 au 
 T_jup = 3.426 
[ 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 15.3   n/a MPO432620  

109904 (2001 ST21)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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