+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58188 (1991 TA9) Classification: Outer Main-belt Asteroid          SPK-ID: 2058188 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1704317900449218 5.3173e-08   a 3.932528492118192 3.9545e-08 au q 3.262300621803832 2.1922e-07 au i 5.004935634818536 5.7647e-06 deg node 35.33205266058064 5.025e-05 deg peri 328.1494610127155 5.1916e-05 deg M 258.0175217533489 1.4748e-05 deg tp 2459807.417815899449 (2022-Aug-15.91781590) 0.00012469 TDB period 2848.434542071355 7.80 4.2966e-05 1.176e-07 d yr n .1263852107825554 1.9064e-09 deg/d Q 4.602756362432553 4.6285e-08 au   Orbit Determination Parameters    # obs. used (total)      566      data-arc span      10514 days (28.79 yr)      first obs. used      1991-10-01      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57767      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:51:59   Additional Information  Earth MOID = 2.2618 au   Jupiter MOID = .864641 au   T_jup = 3.030  [ 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 14.1   n/a MPO436189   diameter diameter 9.118 km 1.070 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   geometric albedo albedo 0.053   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   58188 (1991 TA9)          Discovered 1991-Oct-01 by Spacewatch at Kitt Peak Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1991 TA9 = 1999 VF150  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 11:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin