+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4606 Saheki (1987 UM1) Classification: Main-belt Asteroid          SPK-ID: 2004606 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1013134844060655 1.1798e-08   a 2.252591391447834 6.3615e-09 au q 2.024373508637147 2.5866e-08 au i 2.631665510871093 6.9245e-07 deg node 241.1905590192255 1.7489e-05 deg peri 252.5277784217843 2.3404e-05 deg M 192.065943903428 1.1848e-05 deg tp 2459776.547549916598 (2022-Jul-16.04754992) 4.1044e-05 TDB period 1234.87232304281 3.38 5.2311e-06 1.432e-08 d yr n .2915281145122237 1.2349e-09 deg/d Q 2.480809274258522 7.006e-09 au   Orbit Determination Parameters    # obs. used (total)      2698      data-arc span      24593 days (67.33 yr)      first obs. used      1953-08-16      last obs. used      2020-12-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42452      source      ORB      producer      Otto Matic      solution date      2021-Mar-16 16:41:57   Additional Information  Earth MOID = 1.04033 au   Jupiter MOID = 2.54734 au   T_jup = 3.618  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.09   n/a E2021B10   diameter diameter 6.712 km 0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.969 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Brinsfield, J.W. (2009) Minor Planet Bull. 36, 127-128.] [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm] [Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.] [Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.] geometric albedo albedo 0.327   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4606 Saheki (1987 UM1)          Discovered 1987-Oct-27 by Seki, T. at Geisei Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1987 UM1 = 1972 GA1 = 1977 TJ7 = 1977 VF2 = 1982 FH4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 17:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin