+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1549 Mikko (1937 GA) Classification: Main-belt Asteroid          SPK-ID: 2001549 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08434927318216681 2.6553e-08   a 2.230593817709237 5.0766e-09 au q 2.042444850420828 5.8624e-08 au i 5.548316648048584 2.9522e-06 deg node 85.28503238768866 3.6622e-05 deg peri 6.371219600462469 4.3098e-05 deg M 70.36305503834905 2.2352e-05 deg tp 2458762.667415755165 (2019-Oct-06.16741576) 7.5445e-05 TDB period 1216.827925982981 3.33 4.154e-06 1.137e-08 d yr n .2958511982778369 1.01e-09 deg/d Q 2.418742784997646 5.5048e-09 au   Orbit Determination Parameters    # obs. used (total)      3959      data-arc span      26778 days (73.31 yr)      first obs. used      1947-03-18      last obs. used      2020-07-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .34815      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:17:52   Additional Information  Earth MOID = 1.05913 au   Jupiter MOID = 2.70599 au   T_jup = 3.631  [ 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 12.3   n/a MPO416722   diameter diameter 10.376 km 0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.74 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Fauerbach, M. (2019) Minor Planet Bull. 46, 15-19.] geometric albedo albedo 0.359   0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1549 Mikko (1937 GA)          Discovered 1937-Apr-02 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1937 GA = 1935 SG1 = 1940 AO = 1949 YV = 1951 ME  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 18:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin