+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22780 McAlpine (1999 FS37) Classification: Main-belt Asteroid          SPK-ID: 2022780 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09921918190881393 3.2979e-08   a 2.24278959950499 7.2075e-09 au q 2.020261850248508 7.2729e-08 au i 4.693798923312286 3.9591e-06 deg node 27.1708956638351 4.1812e-05 deg peri 199.0822024933887 4.6331e-05 deg M 119.5193142464047 2.0107e-05 deg tp 2458793.197740821499 (2019-Nov-05.69774082) 6.8267e-05 TDB period 1226.82107263405 3.36 5.9139e-06 1.619e-08 d yr n .2934413241101744 1.4145e-09 deg/d Q 2.465317348761471 7.9227e-09 au   Orbit Determination Parameters    # obs. used (total)      1463      data-arc span      15228 days (41.69 yr)      first obs. used      1979-04-01      last obs. used      2020-12-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51776      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:13:03   Additional Information  Earth MOID = 1.01039 au   Jupiter MOID = 2.51051 au   T_jup = 3.622  [ 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 15.58   n/a E2021B10   diameter diameter 1.868 km 0.353 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.384   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22780 McAlpine           Discovered 1999 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Jayleen Jo McAlpine (b. 1993) is a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her biochemistry, medicine, health, and microbiology project. She attends the Sunburst Elementary School, Sunburst, Montana. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20061009/MPCPages.arc Last Updated: 2006-10-14 Alternate Designations  1999 FS37 = 1979 GJ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 03:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin