+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1057 Wanda (1925 QB) Classification: Main-belt Asteroid          SPK-ID: 2001057 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2467247467341376 4.8954e-08   a 2.89441719749807 9.2191e-09 au q 2.180292847502427 1.3913e-07 au i 3.540259541289358 3.8425e-06 deg node 257.8945712296484 6.6577e-05 deg peri 114.6948599565024 6.6905e-05 deg M 63.70989994285708 7.3794e-06 deg tp 2458682.194205980071 (2019-Jul-17.69420598) 3.6358e-05 TDB period 1798.622913392631 4.92 8.5933e-06 2.353e-08 d yr n .2001531267723897 9.5627e-10 deg/d Q 3.608541547493714 1.1494e-08 au   Orbit Determination Parameters    # obs. used (total)      3120      data-arc span      34788 days (95.24 yr)      first obs. used      1925-08-19      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44032      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:58:00   Additional Information  Earth MOID = 1.18372 au   Jupiter MOID = 1.88698 au   T_jup = 3.241  [ 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 11.0   n/a MPO502163 IRAS observations used: 19 diameter diameter 44.657 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 29.173 h n/a LCDB (Rev. 2020-October); 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: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Pray, D. (2005) Minor Planet Bull. 32, 48-51.] [Polakis, T. (2020) Minor Planet Bull. 47, 94-101.] geometric albedo albedo 0.028   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1057 Wanda (1925 QB)          Discovered 1925-Aug-16 by Shajn, G. at Simeis Independent discovery Aug. 19 by K. Reinmuth, Heidelberg, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1925 QB = 1937 AF = 1950 QY = 1965 WG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 06:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin