+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1547 Nele (1929 CZ) Classification: Main-belt Asteroid          SPK-ID: 2001547 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2536448675128855 4.0019e-08   a 2.643478940390037 6.9642e-09 au q 1.972974074781703 1.0595e-07 au i 11.74310711393297 4.7505e-06 deg node 291.3261913400444 1.9683e-05 deg peri 154.8230714914048 2.1387e-05 deg M 161.0011423687552 8.1463e-06 deg tp 2458498.416662648731 (2019-Jan-14.91666265) 3.4358e-05 TDB period 1569.864646472888 4.30 6.2037e-06 1.698e-08 d yr n .2293191332187997 9.0621e-10 deg/d Q 3.31398380599837 8.7306e-09 au   Orbit Determination Parameters    # obs. used (total)      2371      data-arc span      32059 days (87.77 yr)      first obs. used      1932-12-19      last obs. used      2020-09-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38531      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:17:52   Additional Information  Earth MOID = .995551 au   Jupiter MOID = 1.92843 au   T_jup = 3.318  [ 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 10.73   n/a E2021B10   diameter diameter 20.877 km 0.757 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 7.0998 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Licchelli, D. (2006) Minor Planet Bull. 33, 50-51.] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Robinson, L. (2011) http://btboar.tripod.com/lightcurves/] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Benishek, V. (2019) Minor Planet Bull. 46, 341-345.] geometric albedo albedo 0.203   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.798   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.10, mean=9.73, max.=14.95) deg. U-B UB 0.355   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.10, mean=9.73, max.=14.95) deg. Tholen spectral type spec_T TD   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 1547 Nele (1929 CZ)          Discovered 1929-Feb-12 by Bourgeois, P. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1929 CZ = 1932 YQ = 1940 PB = 1953 QA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-03 03:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin