+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   531 Zerlina (A904 GC) Classification: Main-belt Asteroid          SPK-ID: 2000531 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1973043918587429 3.5096e-08   a 2.785457048353371 1.1286e-08 au q 2.23587413937936 1.0088e-07 au i 33.99355094721577 4.5194e-06 deg node 197.7058619098365 6.3468e-06 deg peri 57.93807943628182 1.1837e-05 deg M 315.8022175822739 1.0913e-05 deg tp 2459208.968818359393 (2020-Dec-25.46881836) 5.1964e-05 TDB period 1698.021269485283 4.65 1.032e-05 2.825e-08 d yr n .2120114785777247 1.2885e-09 deg/d Q 3.335039957327381 1.3513e-08 au   Orbit Determination Parameters    # obs. used (total)      2344      data-arc span      42486 days (116.32 yr)      first obs. used      1904-04-12      last obs. used      2020-08-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39617      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:28:35   Additional Information  Earth MOID = 1.3392 au   Jupiter MOID = 1.8962 au   T_jup = 3.057  [ 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 12.0   n/a MPO250196   diameter diameter 17.804 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 16.706 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Brinsfield, J.W. (2008) Minor Planet Bull. 35, 86-87.] [Pilcher, F.; Brinsfield, J.W. (2011) Minor Planet Bull. 38, 206.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.101   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   SMASSII spectral type spec_B B   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) 531 Zerlina (A904 GC)          Discovered 1904-Apr-12 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1975-Dec-20 12:53 < 00:01 Jupiter 1.89167239503811 1.89167204232306 1.89167274775402 9.07882991246242 9.02937566380321 2442767.037060252 0.491755710520594 163.653444870344 15.9562475805765 -87.5153671632636 6285728.89192186 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:28:41 2020-Nov-13 04:28 2082-Dec-23 15:20 < 00:01 Jupiter 1.91878195122584 1.91878133354716 1.91878256890998 9.06599625640732 9.0171732213684 2481852.138620297 0.841741779201413 216.535700440517 20.1854152489101 83.8452222770752 6206098.7533918 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:28:41 2020-Nov-13 04:28 2106-Feb-10 09:58 00:01 Jupiter 1.98527020834217 1.98526909632516 1.98527132038772 9.06351307244061 9.01631644193365 2490300.915462803 1.20584152712613 395.28922288157 14.8445420718249 -82.2299190535383 6650658.44235984 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:28:41 2020-Nov-13 04:28 Alternate Designations  A904 GC = 1955 HA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 14:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin