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9942 (1989 TM1)
Classification: Main-belt Asteroid          SPK-ID: 2009942
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1651649185931831 7.1778e-08  
a 2.59618582205048 1.919e-08 AU
q 2.167387002098736 1.8867e-07 AU
i 9.933535908160367 9.5588e-06 deg
node 21.77729927807855 2.8718e-05 deg
peri 38.37348897952048 3.8521e-05 deg
M 342.5384882586718 2.2407e-05 deg
tp 2457074.610787352367
(2015-Feb-21.11078735)
9.5004e-05 JED
period 1527.925178649082
4.18
1.694e-05
4.638e-08
d
yr
n .2356136314988242 2.6123e-09 deg/d
Q 3.024984642002224 2.2359e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1120  
   data-arc span      9298 days (25.46 yr)  
   first obs. used      1989-09-30  
   last obs. used      2015-03-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48848  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:36:30  

Additional Information
 Earth MOID = 1.18794 AU 
 T_jup = 3.377 
[ 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 13.5 mag n/a MPO313499  
rotation period rot_per 3.0706 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

9942 (1989 TM1)          Discovered 1989-Oct-08 by Hioki, T., Kawasato, N. at Okutama
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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