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9740 (1987 ST11)
Classification: Main-belt Asteroid          SPK-ID: 2009740
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1314166456746545 4.9248e-08  
a 2.360559161171976 1.4205e-08 AU
q 2.050342394294179 1.126e-07 AU
i 5.789446107835432 5.0928e-06 deg
node 45.27208831398136 5.5731e-05 deg
peri 355.9129882302967 6.0509e-05 deg
M 153.9826587586456 2.2528e-05 deg
tp 2456433.882381687799
(2013-May-21.38238169)
8.1667e-05 JED
period 1324.709835749212
3.63
1.1957e-05
3.274e-08
d
yr
n .2717576259229598 2.453e-09 deg/d
Q 2.670775928049773 1.6071e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      16012 days (43.84 yr)  
   first obs. used      1971-03-24  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50044  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:27:02  

Additional Information
 Earth MOID = 1.05837 AU 
 T_jup = 3.533 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO279618  

9740 (1987 ST11)          Discovered 1987-Sep-23 by Debehogne, H. at La Silla (809)
Reference: 19981208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 ST11 = 1969 UQ2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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