+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 49 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1405811331616888 2.9711e-08   a 2.884319820765188 9.4529e-09 au q 2.478838871961298 8.5464e-08 au i 14.31469616677449 3.374e-06 deg node 209.802286627296 1.3778e-05 deg peri 173.6257674886088 1.9491e-05 deg M 244.4198800435337 1.6087e-05 deg tp 2459574.939358550863 (2021-Dec-26.43935855) 8.15e-05 TDB period 1789.21919406384 4.90 8.7958e-06 2.408e-08 d yr n .2012050849858897 9.8912e-10 deg/d Q 3.289800769569077 1.0782e-08 au   Orbit Determination Parameters    # obs. used (total)      2991      data-arc span      46010 days (125.97 yr)      first obs. used      1894-11-22      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40065      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:53:13   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. 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.DB Last Updated: 2003-08-29 [ show close-approach data ] 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 ] 2021-Jan-18 15:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin