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408751 (1987 SF3)
Classification: Amor [NEO]          SPK-ID: 2408751
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5344473308858815 2.5094e-08  
a 2.251983660770981 7.1465e-09 au
q 1.048417004073314 5.639e-08 au
i 3.346540146842186 3.4082e-06 deg
node 186.9978970688917 4.9549e-05 deg
peri 134.5692935448034 5.0371e-05 deg
M 253.6461026836415 4.9087e-06 deg
tp 2459365.167607732794
(2021-May-30.66760773)
1.7974e-05 TDB
period 1234.372619118054
3.38
5.8758e-06
1.609e-08
d
yr
n .2916461321519074 1.3883e-09 deg/d
Q 3.455550317468647 1.0966e-08 au
  Orbit Determination Parameters
   # obs. used (total)      306  
   data-arc span      10015 days (27.42 yr)  
   first obs. used      1987-07-18  
   last obs. used      2014-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44559  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-24 07:23:10  

Additional Information
 Earth MOID = .0547239 au 
 Jupiter MOID = 1.91253 au 
 T_jup = 3.421 
[ 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 19.0   n/a MPO315133  
diameter diameter 0.399 km 0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 21.0 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:
[Warner, B.D. (2015) Minor Planet Bull. 42, 41-53.]
geometric albedo albedo 0.278   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

408751 (1987 SF3)          Discovered 1987-Sep-26 by Shoemaker, C. S., Shoemaker, E. M. at Palomar
Reference: Last Updated: 2014-10-09

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Alternate Designations
 1987 SF3 = 2014 KH2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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