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392 Wilhelmina (A894 VD)
Classification: Main-belt Asteroid          SPK-ID: 2000392
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397041010420907 2.0113e-08  
a 2.885965817398995 8.3428e-09 au
q 2.482784557241066 5.9711e-08 au
i 14.31261051626952 6.4261e-07 deg
node 209.6735291448564 1.5939e-06 deg
peri 173.3892036650101 6.1719e-06 deg
M 324.3182591305768 8.6052e-06 deg
tp 2459573.991980443195
(2021-Dec-25.49198044)
4.3177e-05 TDB
period 1790.750994840211
4.90
7.7651e-06
2.126e-08
d
yr
n .2010329750128788 8.7173e-10 deg/d
Q 3.289147077556925 9.5083e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3220  
   data-arc span      46281 days (126.71 yr)  
   first obs. used      1894-11-22  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39852  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:34:11  

Additional Information
 Earth MOID = 1.48652 au 
 Jupiter MOID = 2.16649 au 
 T_jup = 3.232 
[ 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 9.8   n/a MPO347514  
diameter diameter 60.750 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.058 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2017) Minor Planet Bull. 44, 9.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.173   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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 (A894 VD)          Discovered 1894-Nov-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A894 VD = 1931 HD = 1933 SW = 1933 UZ = 1952 ON 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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