+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1507 Vaasa (1939 RD) Classification: Main-belt Asteroid          SPK-ID: 2001507 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2448945043772645 2.3569e-08   a 2.331664899089658 7.3803e-09 au q 1.760652979253232 5.2514e-08 au i 9.225387408763572 7.1866e-07 deg node 292.8025189386497 3.5671e-06 deg peri 50.39235476343318 5.8119e-06 deg M .4168797738270818 8.1103e-06 deg tp 2459394.994065950278 (2021-Jun-29.49406595) 2.9292e-05 TDB period 1300.461888383448 3.56 6.1744e-06 1.69e-08 d yr n .27682472144378 1.3143e-09 deg/d Q 2.902676818926085 9.1877e-09 au   Orbit Determination Parameters    # obs. used (total)      1934      data-arc span      23226 days (63.59 yr)      first obs. used      1957-11-25      last obs. used      2021-06-28      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46214      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:28:05   Additional Information  Earth MOID = .767336 au   Jupiter MOID = 2.54227 au   T_jup = 3.513  [ 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 13.70   n/a E2021B10   diameter diameter 4.648 km 0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 34.07 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2004) Minor Planet Bull. 31, 4-6.] geometric albedo albedo 0.444   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1507 Vaasa (1939 RD)          Discovered 1939-Sep-12 by Oterma, L. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1939 RD = 1964 TA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 23:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin