+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   916 America (A915 PE) Classification: Main-belt Asteroid          SPK-ID: 2000916 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2371165202796916 3.9364e-08   a 2.36465977799309 6.0868e-09 au q 1.803959879790021 9.3565e-08 au i 11.09386584366177 3.9568e-06 deg node 329.7688341514395 1.8094e-05 deg peri 41.59717992970082 1.9049e-05 deg M 265.3975862599409 6.8952e-06 deg tp 2459349.520663543435 (2021-May-15.02066354) 2.5992e-05 TDB period 1328.163139905506 3.64 5.1281e-06 1.404e-08 d yr n .2710510397281561 1.0466e-09 deg/d Q 2.92535967619616 7.53e-09 au   Orbit Determination Parameters    # obs. used (total)      2852      data-arc span      35318 days (96.70 yr)      first obs. used      1924-01-29      last obs. used      2020-10-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .3882      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:24:24   Additional Information  Earth MOID = .817902 au   Jupiter MOID = 2.5912 au   T_jup = 3.486  [ 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 11.5   n/a MPO384754   diameter diameter 33.23 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 rotation period rot_per 37.294 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Di Martino, M. (1986) in Asteroids, Comets, Meteors II. C.-I. Lagerkvist, B.A. Lindblad, M. Lundstedt, H. Rickman, eds. Uppsala, pp. 81-84.] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Polakis, T. (2018) Minor Planet Bull. 45, 112-115.] geometric albedo albedo 0.0530   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 916 America (A915 PE)          Discovered 1915-Aug-07 by Neujmin, G. at Simeis Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2000-May-31 01:17 < 00:01 Amphi 0.0451847827597779 0.0451836315258206 0.0451859339938309 4.15977791798819 4.15977788740303 2451695.553721332 0.336336614892707 57.5508942282383 37.5744170085647 5.78069792975884 118195.315911075 T 33 CATAB v2.0f-lin.ifort 2020-Nov-13 04:24:32 2020-Nov-13 04:24 2098-Oct-28 18:58 < 00:01 Hebe 0.0348617145620494 0.0348528155391014 0.0348706140157752 7.6333672797976 7.63336725643654 2487640.290603241 0.600458173707628 484.033566859439 22.2882374239753 -23.5843131679699 94118.1759520584 T 33 CATAB v2.0f-lin.ifort 2020-Nov-13 04:24:32 2020-Nov-13 04:24 2197-Jan-05 08:17 00:01 Hebe 0.037898490720628 0.0378792068202876 0.0379177754544323 7.63360208013723 7.63360205864873 2523502.845159189 1.0183786212601 1001.48542571953 21.8367928861403 16.2561864199999 72865.6519498384 T 33 CATAB v2.0f-lin.ifort 2020-Nov-13 04:24:32 2020-Nov-13 04:24 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-29 15:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin