+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   91624 (1999 TP44) Classification: Main-belt Asteroid          SPK-ID: 2091624 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .01033209697791178 3.7412e-08   a 3.197617670161954 2.5541e-08 au q 3.164579574295556 1.1284e-07 au i 7.451403661517439 4.2969e-06 deg node 222.4683346350561 2.8948e-05 deg peri 244.1838796937706 0.00022953 deg M 138.9709992708196 0.00023017 deg tp 2458194.268227325813 (2018-Mar-16.76822733) 0.0013313 TDB period 2088.518033874793 5.72 2.5023e-05 6.851e-08 d yr n .1723710277627328 2.0652e-09 deg/d Q 3.230655766028351 2.5805e-08 au   Orbit Determination Parameters    # obs. used (total)      748      data-arc span      7594 days (20.79 yr)      first obs. used      1999-10-03      last obs. used      2020-07-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54713      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:39:10   Additional Information  Earth MOID = 2.188 au   Jupiter MOID = 1.78386 au   T_jup = 3.182  [ 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 14.5   n/a MPO432453   diameter diameter 8.052 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.052   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   91624 (1999 TP44)          Discovered 1999-Oct-03 by Spacewatch at Kitt Peak Reference: 20041028/Numbers.arc Last Updated: 2004-10-29 [ show close-approach data ] Alternate Designations  1999 TP44 = 2002 GT39  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 14:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin