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866 Fatme (A917 DG)
Classification: Main-belt Asteroid          SPK-ID: 2000866
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 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05226736168903977 3.398e-08  
a 3.12384861640134 1.3362e-08 au
q 2.960573290906085 1.0706e-07 au
i 8.661590722271477 3.6277e-06 deg
node 91.06018552354932 2.5861e-05 deg
peri 263.2010411906512 4.4125e-05 deg
M 34.54366615931568 3.5659e-05 deg
tp 2458806.991822237046
(2019-Nov-19.49182224)
0.00019987 TDB
period 2016.66330589745
5.52
1.2939e-05
3.543e-08
d
yr
n .1785126941851078 1.1453e-09 deg/d
Q 3.287123941896595 1.406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3189  
   data-arc span      37779 days (103.43 yr)  
   first obs. used      1917-02-25  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44189  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:51  

Additional Information
 Earth MOID = 1.97137 au 
 Jupiter MOID = 1.99203 au 
 T_jup = 3.196 
[ 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 9.5   n/a MPO431502  
diameter diameter 78.061 km 0.360 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.800 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:
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.]
geometric albedo albedo 0.046   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

866 Fatme (A917 DG)          Discovered 1917-Feb-25 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A917 DG = 1950 DF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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