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821 Fanny (A916 GH)
Classification: Main-belt Asteroid          SPK-ID: 2000821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2123005712803561 3.382e-08  
a 2.771795219649187 8.8073e-09 au
q 2.183341511045505 9.3575e-08 au
i 5.398941740528606 4.2363e-06 deg
node 209.756423061874 3.361e-05 deg
peri 32.86200229365732 3.4704e-05 deg
M 150.4145284655561 9.5759e-06 deg
tp 2458296.249077048402
(2018-Jun-26.74907705)
4.3738e-05 TDB
period 1685.544174814418
4.61
8.0337e-06
2.2e-08
d
yr
n .2135808751732282 1.018e-09 deg/d
Q 3.36024892825287 1.0677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3184  
   data-arc span      38107 days (104.33 yr)  
   first obs. used      1916-04-01  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:02  

Additional Information
 Earth MOID = 1.1731 au 
 Jupiter MOID = 1.6627 au 
 T_jup = 3.297 
[ 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 11.8   n/a MPO502161  
diameter diameter 28.856 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 236.6 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.]
geometric albedo albedo 0.025   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.706   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.47 deg.
U-B UB 0.321   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.47 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

821 Fanny (A916 GH)          Discovered 1916-Mar-31 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 GH = 1930 HC = 1930 HO = 1930 HT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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