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118417 (1999 TW12)
Classification: Main-belt Asteroid          SPK-ID: 2118417
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2399465551043738 4.6164e-08  
a 3.109268501503165 2.6118e-08 au
q 2.363210235672942 1.4026e-07 au
i 17.20551315261913 6.2107e-06 deg
node 34.85449051261465 1.8208e-05 deg
peri 61.37881887693946 2.2122e-05 deg
M 227.1471993176754 1.2147e-05 deg
tp 2459739.516238352501
(2022-Jun-09.01623835)
7.0031e-05 TDB
period 2002.561063376186
5.48
2.5233e-05
6.908e-08
d
yr
n .1797697990757215 2.2651e-09 deg/d
Q 3.855326767333388 3.2385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      6819 days (18.67 yr)  
   first obs. used      1999-10-04  
   last obs. used      2018-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54459  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 04:38:29  

Additional Information
 Earth MOID = 1.43121 au 
 Jupiter MOID = 1.78704 au 
 T_jup = 3.107 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO432687  
diameter diameter 3.921 km 1.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.355 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.347   0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118417 (1999 TW12)          Discovered 1999-Oct-10 by Juels, C. W. at Fountain Hills
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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