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11661 (1997 FK4)
Classification: Main-belt Asteroid          SPK-ID: 2011661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .14326226012188 3.5878e-08  
a 2.785778550837603 1.2726e-08 au
q 2.386681619445552 9.984e-08 au
i 8.728696958487689 5.0451e-06 deg
node 3.490380086089127 2.377e-05 deg
peri 62.43675482319565 3.1254e-05 deg
M 107.516518106801 1.7791e-05 deg
tp 2458493.286268029298
(2019-Jan-09.78626803)
8.3968e-05 TDB
period 1698.315260991534
4.65
1.1638e-05
3.186e-08
d
yr
n .2119747777511107 1.4525e-09 deg/d
Q 3.184875482229654 1.4549e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      12555 days (34.37 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:06:47  

Additional Information
 Earth MOID = 1.41449 au 
 Jupiter MOID = 2.19077 au 
 T_jup = 3.299 
[ 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 13.6   n/a MPO492884  
diameter diameter 5.257 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.192 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 0.212   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11661 (1997 FK4)          Discovered 1997-Mar-31 by LINEAR at Socorro
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 FK4 = 1985 SN4 = 1992 DT = 1997 GW20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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