+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11734 (1998 KM55) Classification: Main-belt Asteroid          SPK-ID: 2011734 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1304078037152343 1.4153e-08   a 2.650331483939924 1.0502e-08 au q 2.304707576001981 3.8522e-08 au i 12.48836464839099 4.5506e-07 deg node 221.5056488275946 7.8132e-07 deg peri 254.4934033569845 8.3615e-06 deg M 210.9007124063138 1.0129e-05 deg tp 2459853.212286766658 (2022-Sep-30.71228677) 4.6042e-05 TDB period 1575.972809986434 4.31 9.3674e-06 2.565e-08 d yr n .2284303369441374 1.3578e-09 deg/d Q 2.995955391877867 1.1872e-08 au   Orbit Determination Parameters    # obs. used (total)      2411      data-arc span      26324 days (72.07 yr)      first obs. used      1948-11-24      last obs. used      2020-12-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40152      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:56:19   Additional Information  Earth MOID = 1.35734 au   Jupiter MOID = 2.25896 au   T_jup = 3.345  [ 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 12.52   n/a E2021B10   diameter diameter 7.705 km 0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 12.667 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.326   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   11734 (1998 KM55)          Discovered 1998-May-23 by LINEAR at Socorro Reference: 19990928/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 KM55 = 1948 WO = 1976 JF1 = 1978 TZ2 = 1991 XM2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 01:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin