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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2123005712718636 3.3828e-08  
a 2.771795219542949 8.813e-09 au
q 2.18334151098536 9.3593e-08 au
i 5.398941909371398 4.2386e-06 deg
node 209.7564230363388 3.3677e-05 deg
peri 32.86200236422739 3.4773e-05 deg
M 150.4145284664826 9.5814e-06 deg
tp 2458296.249077084553
(2018-Jun-26.74907708)
4.3769e-05 TDB
period 1685.544174717511
4.61
8.0388e-06
2.201e-08
d
yr
n .2135808751855075 1.0186e-09 deg/d
Q 3.360248928100537 1.0684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3158  
   data-arc span      37928 days (103.84 yr)  
   first obs. used      1916-04-01  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:37:55  

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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