+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15510 Phoeberounds (1999 TF127) Classification: Main-belt Asteroid          SPK-ID: 2015510 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09128048837471001 2.5867e-08   a 2.4275512548715 7.9887e-09 au q 2.205963190772189 6.3421e-08 au i 2.494018026375359 4.3827e-06 deg node 156.0631002731987 7.4919e-05 deg peri 312.5175730033626 8.0921e-05 deg M 85.98284262253561 2.8804e-05 deg tp 2458670.540727431441 (2019-Jul-06.04072743) 0.00011058 TDB period 1381.500477323697 3.78 6.8195e-06 1.867e-08 d yr n .2605862291827852 1.2863e-09 deg/d Q 2.649139318970811 8.718e-09 au   Orbit Determination Parameters    # obs. used (total)      1317      data-arc span      9981 days (27.33 yr)      first obs. used      1992-12-30      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50377      source      ORB      producer      Otto Matic      solution date      2020-May-20 04:12:13   Additional Information  Earth MOID = 1.22359 au   Jupiter MOID = 2.4315 au   T_jup = 3.503  [ 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 15.3   n/a MPO467861   diameter diameter 5.169 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15510 Phoeberounds           Discovered 1999 Oct. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Phoebe Robeson Rounds (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for her physics project. She attends the Irondequoit High School, Rochester, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030216/MPCPages.arc Last Updated: 2011-11-22 [ show close-approach data ] Alternate Designations  1999 TF127 = 1992 YE5 = 1997 EK39  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-24 03:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin