+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4299 WIYN (1952 QX) Classification: Main-belt Asteroid          SPK-ID: 2004299 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .171202548744655 3.2208e-08   a 2.243602865837126 5.7334e-09 au q 1.859492336834997 7.3198e-08 au i 5.086325221957561 3.2525e-06 deg node 104.4007013938059 3.932e-05 deg peri 272.7713811626918 4.0409e-05 deg M 91.44164325200308 1.0072e-05 deg tp 2458888.712336715601 (2020-Feb-09.21233672) 3.3965e-05 TDB period 1227.488426395104 3.36 4.7052e-06 1.288e-08 d yr n .2932817876395384 1.1242e-09 deg/d Q 2.627713394839254 6.715e-09 au   Orbit Determination Parameters    # obs. used (total)      2828      data-arc span      24986 days (68.41 yr)      first obs. used      1952-08-28      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40682      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:16:59   Additional Information  Earth MOID = .868136 au   Jupiter MOID = 2.84544 au   T_jup = 3.608  [ 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 12.8   n/a MPO337287   diameter diameter 7.938 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 26. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm] geometric albedo albedo 0.256   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B S   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) 4299 WIYN (1952 QX)          Discovered 1952-Aug-28 by Indiana University at Brooklyn Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1952 QX = 1952 SC = 1952 TJ = 1974 DE1 = 1986 WE7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 08:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin