+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1536 Pielinen (1939 SE) Classification: Main-belt Asteroid          SPK-ID: 2001536 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1955998987487217 2.7055e-08   a 2.20375778950895 4.5571e-09 au q 1.772702989014292 6.0386e-08 au i 1.534439940694063 2.9317e-06 deg node 195.6872535216575 0.00011623 deg peri 170.6537632386861 0.00011656 deg M 237.2099579356477 1.0699e-05 deg tp 2459408.072492029796 (2021-Jul-12.57249203) 3.6346e-05 TDB period 1194.934822596035 3.27 3.7064e-06 1.015e-08 d yr n .3012716620124001 9.3448e-10 deg/d Q 2.634812590003607 5.4484e-09 au   Orbit Determination Parameters    # obs. used (total)      3042      data-arc span      42628 days (116.71 yr)      first obs. used      1903-10-01      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41874      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:32:43   Additional Information  Earth MOID = .771208 au   Jupiter MOID = 2.82692 au   T_jup = 3.637  [ 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 12.7   n/a MPO267713   diameter diameter 7.975 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 66.22 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm] [Stephens, R.D. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html] [Casalnuovo, G.B. (2016) Minor Planet Bull. 43, 112-115.] geometric albedo albedo 0.253   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1536 Pielinen (1939 SE)          Discovered 1939-Sep-18 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1939 SE = 1929 RZ = 1931 ED = 1934 CW = 1939 TP = 1939 UK = 1952 RW = A903 SF = A916 RA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-11 09:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin