+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2468535808555105 4.8673e-08   a 2.894578798342335 9.2148e-09 au q 2.180041656903089 1.3824e-07 au i 3.539906091058262 3.7284e-06 deg node 257.8887743016196 6.5681e-05 deg peri 114.7086444983951 6.5999e-05 deg M 103.7145233744068 7.384e-06 deg tp 2458682.280719400398 (2019-Jul-17.78071940) 3.5995e-05 TDB period 1798.773546327584 4.92 8.5895e-06 2.352e-08 d yr n .2001363655447258 9.5569e-10 deg/d Q 3.609115939781581 1.1489e-08 au   Orbit Determination Parameters    # obs. used (total)      3268      data-arc span      34857 days (95.43 yr)      first obs. used      1925-08-19      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43172      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:52:07   Additional Information  Earth MOID = 1.18204 au   Jupiter MOID = 1.88751 au   T_jup = 3.240  [ 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 11.05   n/a E2021B10 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-Mar-03 03:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin