+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1227 Geranium (1931 TD) Classification: Outer Main-belt Asteroid          SPK-ID: 2001227 [ 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 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1923021053417678 3.9286e-08   a 3.219331452393037 1.6046e-08 au q 2.600247236304885 1.2782e-07 au i 16.4900101514814 4.0321e-06 deg node .6641476606858213 1.3984e-05 deg peri 302.9962707967267 1.6612e-05 deg M 194.1231861933331 1.094e-05 deg tp 2459972.642991990499 (2023-Jan-28.14299199) 6.577e-05 TDB period 2109.827582801772 5.78 1.5774e-05 4.319e-08 d yr n .170630056661755 1.2757e-09 deg/d Q 3.838415668481189 1.9131e-08 au   Orbit Determination Parameters    # obs. used (total)      2847      data-arc span      32550 days (89.12 yr)      first obs. used      1931-10-05      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40145      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:59:15   Additional Information  Earth MOID = 1.62847 au   Jupiter MOID = 1.73484 au   T_jup = 3.097  [ 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 10.8   n/a MPO344305   diameter diameter 46.269 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 12.363 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.] geometric albedo albedo 0.071   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1227 Geranium (1931 TD)          Discovered 1931-Oct-05 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1931 TD = 1934 CL1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 00:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin