+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .192449430036997 3.6177e-08   a 3.218195860587208 1.5194e-08 au q 2.598855901469777 1.1947e-07 au i 16.49472614196707 4.008e-06 deg node .6560891643129477 1.2023e-05 deg peri 303.1232776753159 1.5021e-05 deg M 261.5621697052309 1.102e-05 deg tp 2459973.102693283345 (2023-Jan-28.60269328) 6.5574e-05 TDB period 2108.711345632278 5.77 1.4933e-05 4.088e-08 d yr n .1707203789393267 1.209e-09 deg/d Q 3.837535819704639 1.8118e-08 au   Orbit Determination Parameters    # obs. used (total)      3369      data-arc span      32775 days (89.73 yr)      first obs. used      1931-10-05      last obs. used      2021-06-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .3863      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:07:43   Additional Information  Earth MOID = 1.62639 au   Jupiter MOID = 1.73538 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-Jul-26 14:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin