+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1486 Marilyn (1938 QA) Classification: Main-belt Asteroid          SPK-ID: 2001486 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1242584213779813 1.4215e-08   a 2.198457218475714 3.8557e-09 au q 1.925280395040894 3.1801e-08 au i .07520356099503328 5.4827e-07 deg node 332.902646296726 0.00065942 deg peri 350.2125000537412 0.00065988 deg M 96.56825155093597 5.9753e-06 deg tp 2458881.120289826245 (2020-Feb-01.62028983) 1.9596e-05 TDB period 1190.626254653746 3.26 3.1322e-06 8.575e-09 d yr n .3023618861022799 7.9543e-10 deg/d Q 2.471634041910534 4.3348e-09 au   Orbit Determination Parameters    # obs. used (total)      3533      data-arc span      30154 days (82.56 yr)      first obs. used      1938-08-23      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41123      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 12:31:37   Additional Information  Earth MOID = .910873 au   Jupiter MOID = 2.79428 au   T_jup = 3.657  [ 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 12.86   n/a E2021B10   diameter diameter 6.414 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.566 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Benishek, V. (2014) Minor Planet Bull. 41, 126-127.] [Ferrero, A. (2014) Minor Planet Bull. 41, 24-25.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.391   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1486 Marilyn (1938 QA)          Discovered 1938-Aug-23 by Delporte, E. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-19 04:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin