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18666 (1998 FT53)
Classification: Main-belt Asteroid          SPK-ID: 2018666
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784573607544824 2.3182e-08  
a 2.640428359775624 1.2641e-08 au
q 2.169224483428779 6.6964e-08 au
i 12.14998887744267 4.005e-07 deg
node 348.5675246350589 9.3641e-07 deg
peri 357.113481232581 4.8337e-06 deg
M 313.6067079900509 8.3124e-06 deg
tp 2459402.458761960680
(2021-Jul-06.95876196)
3.7069e-05 TDB
period 1567.147989632924
4.29
1.1254e-05
3.081e-08
d
yr
n .2297166587849329 1.6497e-09 deg/d
Q 3.111632236122469 1.4897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1914  
   data-arc span      23866 days (65.34 yr)  
   first obs. used      1955-04-20  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46029  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:34:35  

Additional Information
 Earth MOID = 1.16054 au 
 Jupiter MOID = 2.30789 au 
 T_jup = 3.341 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.03   n/a E2021B10  
diameter diameter 7.301 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.5970 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.159   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18666 (1998 FT53)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FT53 = 1961 VT = 1978 RP1 = 1991 SB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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