+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09059533016082565 2.4851e-08   a 2.428935789173739 7.5328e-09 au q 2.208885549414098 6.0266e-08 au i 2.494475403287278 4.0023e-06 deg node 156.044733110468 7.0747e-05 deg peri 312.629723397535 7.5511e-05 deg M 189.0677038480773 2.5647e-05 deg tp 2460053.014169319582 (2023-Apr-18.51416932) 9.9122e-05 TDB period 1382.682537330387 3.79 6.4321e-06 1.761e-08 d yr n .2603634531286333 1.2112e-09 deg/d Q 2.648986028933379 8.2153e-09 au   Orbit Determination Parameters    # obs. used (total)      1384      data-arc span      10396 days (28.46 yr)      first obs. used      1992-12-30      last obs. used      2021-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50343      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:27:53   Additional Information  Earth MOID = 1.22683 au   Jupiter MOID = 2.42995 au   T_jup = 3.502  [ 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 15.29   n/a E2021B10   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 Alternate Designations  1999 TF127 = 1992 YE5 = 1997 EK39  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-01 17:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin