+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2449199101347858 4.0088e-08   a 2.331364178400392 8.71e-09 au q 1.760366673335109 9.3114e-08 au i 9.226753251378614 4.3132e-06 deg node 292.8046795766665 2.4361e-05 deg peri 50.45918291342591 2.6057e-05 deg M 306.1096292947638 1.3851e-05 deg tp 2459395.135599000378 (2021-Jun-29.63559900) 5.0897e-05 TDB period 1300.210310732336 3.56 7.2864e-06 1.995e-08 d yr n .2768782842502087 1.5516e-09 deg/d Q 2.902361683465674 1.0843e-08 au   Orbit Determination Parameters    # obs. used (total)      1850      data-arc span      22884 days (62.65 yr)      first obs. used      1957-11-25      last obs. used      2020-07-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46693      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:18:18   Additional Information  Earth MOID = .766066 au   Jupiter MOID = 2.54312 au   T_jup = 3.513  [ 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 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 [ show close-approach data ] Alternate Designations  1939 RD = 1964 TA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 16:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin