+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   31462 Brchnelova (1999 CW22) Classification: Main-belt Asteroid          SPK-ID: 2031462 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07943529888494895 3.2108e-08   a 2.226297113473384 6.6786e-09 au q 2.049450536857926 7.0455e-08 au i 3.451819678662824 2.9949e-06 deg node 79.14535323469856 6.2536e-05 deg peri 60.68689427497743 6.6169e-05 deg M 261.5199042805991 2.2195e-05 deg tp 2459728.409033731778 (2022-May-28.90903373) 7.5206e-05 TDB period 1213.313728734532 3.32 5.4597e-06 1.495e-08 d yr n .2967080908047373 1.3351e-09 deg/d Q 2.403143690088841 7.2091e-09 au   Orbit Determination Parameters    # obs. used (total)      1656      data-arc span      10540 days (28.86 yr)      first obs. used      1992-01-01      last obs. used      2020-11-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53974      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 06:51:27   Additional Information  Earth MOID = 1.06592 au   Jupiter MOID = 2.5982 au   T_jup = 3.639  [ 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 15.26   n/a E2021B10   diameter diameter 2.294 km 0.650 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.255   0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   31462 Brchnelova           Discovered 1999 Feb. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Michaela Brchnelova (b. 1996) was awarded first place in the 2014 Intel International Science and Engineering Fair for her physics and astronomy project. She attends the High School of Jura Hronca, Bratislava, Slovakia. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2015-06-02 Last Updated: 2015-06-04 Alternate Designations  1999 CW22 = 2000 ML2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 17:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin