+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11271 (1988 KB) Classification: Main-belt Asteroid          SPK-ID: 2011271 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .238439229515118 6.9457e-09   a 2.357922445192908 8.2354e-09 au q 1.795701234104708 1.9892e-08 au i 25.65782363720262 5.1635e-07 deg node 88.8135269256197 1.5009e-06 deg peri 145.8383383905939 4.9513e-06 deg M 7.017958205402306 7.6038e-06 deg tp 2459174.718927603889 (2020-Nov-21.21892760) 2.7849e-05 TDB period 1322.490928409269 3.62 6.9285e-06 1.897e-08 d yr n .2722135874557708 1.4261e-09 deg/d Q 2.920143656281109 1.0199e-08 au   Orbit Determination Parameters    # obs. used (total)      2000      data-arc span      11749 days (32.17 yr)      first obs. used      1988-05-14      last obs. used      2020-07-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .38545      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:38:48   Additional Information  Earth MOID = .81314 au   Jupiter MOID = 2.23 au   T_jup = 3.385  [ 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 13.07   n/a E2021B10   diameter diameter 6.815 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 6.362 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2006) http://www.asu.cas.cz/~ppravec/neo.htm] [Pray, D.P.; Galad, A.; Gajdos, S.; Vilagi, J.; et al. (2006) Minor Planet Bull. 33, 92-95.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.247   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   11271 (1988 KB)          Discovered 1988-May-19 by Helin, E. F. at Palomar Reference: 19990831/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1988 KB = 1995 KA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-16 10:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin