+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1634 Ndola (1935 QP) Classification: Main-belt Asteroid          SPK-ID: 2001634 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1618318279796508 3.17e-08   a 2.245639398519857 5.7874e-09 au q 1.882223469674265 7.0782e-08 au i 7.598365287882396 3.6712e-06 deg node 90.72073028539074 2.9053e-05 deg peri 190.9171610250552 3.1517e-05 deg M 95.55146018863879 1.3593e-05 deg tp 2458674.255436758445 (2019-Jul-09.75543676) 4.5978e-05 TDB period 1229.160104252646 3.37 4.7516e-06 1.301e-08 d yr n .29288291960866 1.1322e-09 deg/d Q 2.60905532736545 6.724e-09 au   Orbit Determination Parameters    # obs. used (total)      2323      data-arc span      33474 days (91.65 yr)      first obs. used      1928-05-14      last obs. used      2020-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45463      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 16:00:25   Additional Information  Earth MOID = .866364 au   Jupiter MOID = 2.52151 au   T_jup = 3.602  [ 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 MPO435711   diameter diameter 9.035 km 1.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 64.23 h n/a LCDB (Rev. 2019-August); 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: [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.179   0.092 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) 1634 Ndola           Discovered 1935 Aug. 19 by C. Jackson at Johannesburg. Named for the most important mining town in Zambia. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC 5182 Last Updated: 2006-03-21 Alternate Designations  1935 QP = 1928 KB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-06 10:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin