+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1535 Paijanne (1939 RC) Classification: Main-belt Asteroid          SPK-ID: 2001535 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1924663368727444 2.0213e-08   a 3.164318724978054 1.2941e-08 au q 2.555293891283695 6.932e-08 au i 6.056506164191616 7.8868e-07 deg node 264.7648621798544 1.2635e-05 deg peri 40.20163624892836 1.4111e-05 deg M 267.0419512001423 5.9791e-06 deg tp 2459927.388425811344 (2022-Dec-13.88842581) 3.5892e-05 TDB period 2055.979398874565 5.63 1.2613e-05 3.453e-08 d yr n .1750990307573425 1.0742e-09 deg/d Q 3.773343558672413 1.5432e-08 au   Orbit Determination Parameters    # obs. used (total)      3423      data-arc span      32078 days (87.82 yr)      first obs. used      1933-08-28      last obs. used      2021-06-25      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40026      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:29:49   Additional Information  Earth MOID = 1.54331 au   Jupiter MOID = 1.49109 au   T_jup = 3.166  [ 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 11.49   n/a E2021B10   diameter diameter 23.836 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.8448 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.164   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1535 Paijanne (1939 RC)          Discovered 1939-Sep-09 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1939 RC = 1933 QE1 = 1944 OA = 1956 XB = 1985 XE2 = A916 OB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-26 13:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin