+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1923876098936093 3.881e-08   a 3.21888003626018 1.5916e-08 au q 2.59960739954983 1.2654e-07 au i 16.49252088392963 4.0298e-06 deg node .6575824266577877 1.3732e-05 deg peri 303.0554061459768 1.6377e-05 deg M 228.1832968378579 1.0981e-05 deg tp 2459972.866730777417 (2023-Jan-28.36673078) 6.5725e-05 TDB period 2109.38383687119 5.78 1.5645e-05 4.283e-08 d yr n .1706659516904146 1.2658e-09 deg/d Q 3.83815267297053 1.8978e-08 au   Orbit Determination Parameters    # obs. used (total)      2972      data-arc span      32613 days (89.29 yr)      first obs. used      1931-10-05      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39465      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:53:41   Additional Information  Earth MOID = 1.62591 au   Jupiter MOID = 1.73521 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 10.86   n/a E2021B10   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-Feb-27 20:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin