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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1655106147195138 6.7501e-08  
a 2.597609120948101 1.8284e-08 au
q 2.167677238538965 1.762e-07 au
i 9.934627912667516 8.9266e-06 deg
node 21.76001986169293 2.7847e-05 deg
peri 38.54474166250809 3.7863e-05 deg
M 76.60152138423736 2.2052e-05 deg
tp 2457075.117626956117
(2015-Feb-21.61762696)
9.4177e-05 JED
period 1529.181825361261
4.19
1.6145e-05
4.42e-08
d
yr
n .2354200095956227 2.4855e-09 deg/d
Q 3.027541003357237 2.131e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      9575 days (26.21 yr)  
   first obs. used      1989-09-30  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49538  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:12:27  

Additional Information
 Earth MOID = 1.18766 au 
 Jupiter MOID = 2.38644 au 
 T_jup = 3.376 
[ 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-December); 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. 150, A75.]

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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