+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1104 Syringa (1928 XA) Classification: Main-belt Asteroid          SPK-ID: 2001104 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3436557835209009 3.1499e-08   a 2.629045736138822 1.02e-08 au q 1.725558963773751 8.4132e-08 au i 6.441905344913462 3.283e-06 deg node 128.6538577751014 3.4685e-05 deg peri 277.4013929909539 3.5062e-05 deg M 176.9397480315218 8.628e-06 deg tp 2458235.223208623830 (2018-Apr-26.72320862) 3.4144e-05 TDB period 1557.025190554362 4.26 9.0615e-06 2.481e-08 d yr n .2312101321057149 1.3456e-09 deg/d Q 3.532532508503893 1.3706e-08 au   Orbit Determination Parameters    # obs. used (total)      2742      data-arc span      33485 days (91.68 yr)      first obs. used      1928-12-09      last obs. used      2020-08-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45425      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:22:28   Additional Information  Earth MOID = .749565 au   Jupiter MOID = 1.91927 au   T_jup = 3.306  [ 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 MPO337252   diameter diameter 23.244 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.1547 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Molnar, L.A.; Haegert, M.J.; Beaumonts, C.N.; Block, M.J.; et al. (2008) Minor Planet Bull. 35, 9-12.] geometric albedo albedo 0.033   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B Xk   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) 1104 Syringa (1928 XA)          Discovered 1928-Dec-09 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 05:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin