+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17076 Betti (1999 HO) Classification: Main-belt Asteroid          SPK-ID: 2017076 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08535310524133144 3.7588e-08   a 2.425039244982878 9.5087e-09 au q 2.218054615091496 9.2005e-08 au i 7.046821661053659 4.0879e-06 deg node 48.5970554249326 3.1791e-05 deg peri 107.9633778342671 3.9633e-05 deg M 308.4358902295385 2.4214e-05 deg tp 2459398.070276341033 (2021-Jul-02.57027634) 9.3211e-05 TDB period 1379.356684317584 3.78 8.1128e-06 2.221e-08 d yr n .2609912317045858 1.535e-09 deg/d Q 2.632023874874261 1.032e-08 au   Orbit Determination Parameters    # obs. used (total)      1354      data-arc span      11431 days (31.30 yr)      first obs. used      1989-11-22      last obs. used      2021-03-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49691      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:53:01   Additional Information  Earth MOID = 1.23825 au   Jupiter MOID = 2.36028 au   T_jup = 3.496  [ 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 14.90   n/a E2021B10   diameter diameter 2.370 km 0.749 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.314   0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17076 Betti           Discovered 1999 Apr. 18 by P. G. Comba at Prescott. Enrico Betti (1823-1892) taught at the University of Pisa and published on various topics in algebra and analysis. His research on the analysis situs (topology) of hyperspaces led to the definition of the "Betti numbers", which characterize the connectivity of a manifold. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010109/MPCPages.arc Last Updated: 2009-05-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-15 01:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin