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392 Wilhelmina (1894 BF)
Classification: Main-belt Asteroid          SPK-ID: 2000392
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1413623574467365 3.2729e-08  
a 2.883535122379034 1.3706e-08 au
q 2.47591179969907 9.1396e-08 au
i 14.32109558256294 3.8704e-06 deg
node 209.8191086363802 1.7692e-05 deg
peri 174.112191526902 2.3917e-05 deg
M 321.9999788339586 1.8902e-05 deg
tp 2457789.285064680712
(2017-Feb-04.78506468)
9.4698e-05 JED
period 1788.489090258475
4.90
1.2752e-05
3.491e-08
d
yr
n .2012872216894386 1.4352e-09 deg/d
Q 3.291158445058998 1.5644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1448  
   data-arc span      44333 days (121.38 yr)  
   first obs. used      1894-11-22  
   last obs. used      2016-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52271  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:27:31  

Additional Information
 Earth MOID = 1.47908 au 
 Jupiter MOID = 2.15798 au 
 T_jup = 3.233 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.8 mag n/a MPO347514  
diameter diameter 62.88 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 17.96 h n/a LCDB (Rev. 2016-February); 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:
[Gil-Hutton, R.; Canada, M. (2003) Revista Mexicana de Astronomica y Astrofisica 39, 69-76.]
geometric albedo albedo 0.0589   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
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)

392 Wilhelmina (1894 BF)          Discovered 1894-Nov-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1894 BF = 1931 HD = 1933 SW = 1933 UZ = 1952 ON 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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