+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11768 Merrill (4107 T-1) Classification: Main-belt Asteroid          SPK-ID: 2011768 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06929116615836144 3.3138e-08   a 3.162909309502339 1.8604e-08 au q 2.943747634993785 1.0865e-07 au i 9.279715383225897 4.7595e-06 deg node 11.22008145732732 2.3937e-05 deg peri 83.01334005716544 4.8896e-05 deg M 23.16506620763973 3.9969e-05 deg tp 2459068.291438115051 (2020-Aug-06.79143811) 0.00022825 TDB period 2054.605924799168 5.63 1.8127e-05 4.963e-08 d yr n .1752160819039734 1.5459e-09 deg/d Q 3.382070984010894 1.9893e-08 au   Orbit Determination Parameters    # obs. used (total)      1718      data-arc span      18201 days (49.83 yr)      first obs. used      1971-03-24      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4684      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:02:23   Additional Information  Earth MOID = 1.97903 au   Jupiter MOID = 1.76824 au   T_jup = 3.180  [ 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 13.19   n/a E2021B10   diameter diameter 11.767 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 11.4028 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.088   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11768 Merrill           Discovered 1971 Mar. 26 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Paul W. Merrill (1887-1961), a Mt. Wilson Observatory spectroscopist, was the first to detect a short-lived isotope, of technetium, in the atmospheres of stars, thus confirming that nucleosynthesis must occur in stars. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20071124/MPCPages.arc Last Updated: 2007-11-26 [ show close-approach data ] Alternate Designations  4107 T-1 = 1996 TD12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 23:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin