+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11757 Salpeter (2799 P-L) Classification: Main-belt Asteroid          SPK-ID: 2011757 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .241944215432559 8.0142e-08   a 3.13880420576017 2.3503e-08 au q 2.379388684801109 2.5477e-07 au i 29.62461414017616 1.0427e-05 deg node 185.7405702007045 1.2249e-05 deg peri 162.7459685947869 2.0883e-05 deg M 285.3840234466783 1.6624e-05 deg tp 2459621.492241418707 (2022-Feb-10.99224142) 9.6082e-05 TDB period 2031.162948091009 5.56 2.2814e-05 6.246e-08 d yr n .1772383650156412 1.9907e-09 deg/d Q 3.898219726719231 2.919e-08 au   Orbit Determination Parameters    # obs. used (total)      347      data-arc span      21794 days (59.67 yr)      first obs. used      1960-09-24      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56669      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:57:26   Additional Information  Earth MOID = 1.38411 au   Jupiter MOID = 1.61499 au   T_jup = 2.968  [ 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 15.05   n/a E2021B10   diameter diameter 6.697 km 1.888 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.032   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   11757 Salpeter           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Edwin E. Salpeter (b. 1924), born in Austria, educated in Australia and the U.K., has been at Cornell University since 1948. A generalist, he worked with Hans Bethe in quantum electrodynamics and nuclear physics and is best known for the triple- \alpha helium-burning reaction and for the initial mass function of stars. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040306/MPCPages.arc Last Updated: 2004-03-08 [ show close-approach data ] Alternate Designations  2799 P-L = 5180 T-3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 05:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin