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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1433350276837174 3.5406e-08  
a 2.785315982008496 1.1966e-08 au
q 2.386082638619408 9.7837e-08 au
i 8.729333954191597 5.0362e-06 deg
node 3.491723596983096 2.1725e-05 deg
peri 62.36571798840392 2.9204e-05 deg
M 149.9954355620377 1.7536e-05 deg
tp 2458493.066411088554
(2019-Jan-09.56641109)
8.2419e-05 TDB
period 1697.892279547316
4.65
1.0942e-05
2.996e-08
d
yr
n .2120275852222978 1.3664e-09 deg/d
Q 3.184549325397584 1.3682e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1923  
   data-arc span      12676 days (34.70 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47883  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:58:06  

Additional Information
 Earth MOID = 1.41322 au 
 Jupiter MOID = 2.19162 au 
 T_jup = 3.300 
[ 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. 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 0.212   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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