+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21332 (1997 BX) Classification: Main-belt Asteroid          SPK-ID: 2021332 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1554352735658498 3.8146e-08   a 2.3933429022014 7.8906e-09 au q 2.021332993460841 9.1071e-08 au i 3.475809178471437 2.9669e-06 deg node 115.344820741244 7.5495e-05 deg peri 303.6059196133707 7.6455e-05 deg M 211.4736463133556 1.2457e-05 deg tp 2459758.464841743898 (2022-Jun-27.96484174) 4.7996e-05 TDB period 1352.402035342402 3.70 6.6881e-06 1.831e-08 d yr n .2661930332786396 1.3164e-09 deg/d Q 2.76535281094196 9.1171e-09 au   Orbit Determination Parameters    # obs. used (total)      1397      data-arc span      10069 days (27.57 yr)      first obs. used      1992-11-25      last obs. used      2020-06-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52152      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:43:33   Additional Information  Earth MOID = 1.03558 au   Jupiter MOID = 2.55472 au   T_jup = 3.512  [ 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 15.05   n/a E2021B10   diameter diameter 5.791 km 0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.053   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21332 (1997 BX)          Discovered 1997-Jan-18 by Beijing Schmidt CCD Asteroid Program at Xinglong Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 BX = 1992 WN4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 11:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin