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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 | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1405811390099708 3.1391e-08  
a 2.884319822627717 1.0015e-08 au
q 2.478838856693676 8.9443e-08 au
i 14.31469575497139 3.5592e-06 deg
node 209.8022873686864 1.4095e-05 deg
peri 173.6257665684315 1.97e-05 deg
M 244.4198792182144 1.6116e-05 deg
tp 2459574.939363209154
(2021-Dec-26.43936321)
8.1693e-05 TDB
period 1789.219195796903
4.90
9.3191e-06
2.551e-08
d
yr
n .2012050847909995 1.048e-09 deg/d
Q 3.289800788561758 1.1423e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2716  
   data-arc span      45862 days (125.56 yr)  
   first obs. used      1894-11-22  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41793  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:03  

Additional Information
 Earth MOID = 1.48336 au 
 Jupiter MOID = 2.16306 au 
 T_jup = 3.233 
[ 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 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. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2017) Minor Planet Bull. 44, 9.]
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

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