+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1952776769351133 9.9524e-09   a 2.204145904490355 3.8097e-09 au q 1.773725412635434 2.2119e-08 au i 1.53464583070258 3.0255e-07 deg node 195.6425873587318 1.3395e-05 deg peri 170.5583187996376 1.5352e-05 deg M 356.5907808307288 4.4301e-06 deg tp 2459407.819085932309 (2021-Jul-12.31908593) 1.4726e-05 TDB period 1195.250505558593 3.27 3.0989e-06 8.484e-09 d yr n .3011920918048524 7.8089e-10 deg/d Q 2.634566396345275 4.5537e-09 au   Orbit Determination Parameters    # obs. used (total)      3225      data-arc span      43004 days (117.74 yr)      first obs. used      1903-10-01      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41346      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 09:26:10   Additional Information  Earth MOID = .771369 au   Jupiter MOID = 2.82863 au   T_jup = 3.637  [ 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 12.73   n/a E2021B10   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. 2020-October); 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 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 ] 2021-Jul-28 04:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin