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17178 (1999 TK218)
Classification: Main-belt Asteroid          SPK-ID: 2017178
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1995539212273399 3.1401e-08  
a 3.117015614588832 1.7042e-08 au
q 2.495002926170784 9.4851e-08 au
i 5.083712663321641 4.1556e-06 deg
node 21.45162486053809 3.8379e-05 deg
peri 220.6096361634163 3.9982e-05 deg
M 89.16229728095013 1.0256e-05 deg
tp 2458702.664751990437
(2019-Aug-07.16475199)
5.7149e-05 TDB
period 2010.050152910697
5.50
1.6484e-05
4.513e-08
d
yr
n .1791000087628133 1.4688e-09 deg/d
Q 3.73902830300688 2.0442e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1550  
   data-arc span      10860 days (29.73 yr)  
   first obs. used      1991-03-17  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:56:26  

Additional Information
 Earth MOID = 1.48382 au 
 Jupiter MOID = 1.30737 au 
 T_jup = 3.180 
[ 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 13.92   n/a E2021B10  
diameter diameter 8.554 km 0.939 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.067 h n/a LCDB (Rev. 2020-October); 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 0.088   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

17178 (1999 TK218)          Discovered 1999-Oct-15 by LINEAR at Socorro
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TK218 = 1991 FA1 = 1993 TX16 = 1998 RA26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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