+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146259 (2001 BL7) Classification: Main-belt Asteroid          SPK-ID: 2146259 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08814944733178279 2.785e-08   a 2.147963321886256 1.042e-08 au q 1.958621542173042 6.0111e-08 au i 3.026067968506606 3.5899e-06 deg node 69.02622191308299 9.2866e-05 deg peri 209.5120337143218 0.00010189 deg M 261.9300887944173 4.4714e-05 deg tp 2459313.736238397389 (2021-Apr-09.23623840) 0.00014395 TDB period 1149.843457966146 3.15 8.367e-06 2.291e-08 d yr n .3130860966385558 2.2782e-09 deg/d Q 2.33730510159947 1.1339e-08 au   Orbit Determination Parameters    # obs. used (total)      597      data-arc span      8601 days (23.55 yr)      first obs. used      1996-10-10      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51969      source      ORB      producer      Otto Matic      solution date      2020-May-20 23:53:40   Additional Information  Earth MOID = .942882 au   Jupiter MOID = 2.73557 au   T_jup = 3.701  [ hide covariance matrix ] Orbital Elements at Epoch 2457389.5 (2016-Jan-02.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08852203890715654 2.7821e-08   q 1.957805822619677 6.0071e-08 au tp 2457013.724258610206 (2014-Dec-22.22425861) 0.00013595 TDB node 69.04015245026056 9.2886e-05 deg peri 209.4639882406873 0.00010187 deg i 3.026030052093958 3.5897e-06 deg   Orbit Determination Parameters    # obs. used (total)      597      data-arc span      8601 days (23.55 yr)      first obs. used      1996-10-10      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51969      source      ORB      producer      Otto Matic      solution date      2020-May-20 23:53:40   Additional Information  Jupiter MOID = 2.73557 au   T_jup = 3.701  Orbit Covariance (6×6)   e q tp node peri i e 7.740229214478616E-16 -1.650403652353882E-15 4.50442610944222E-13 -8.660691006798756E-15 1.501981047832731E-13 6.332074259529528E-16 q -1.650403652353882E-15 3.608507299930601E-15 -4.452122230514093E-13 1.475848407835929E-14 -1.574516994543112E-13 -1.098833193734136E-15 tp 4.50442610944222E-13 -4.452122230514093E-13 1.848160982914339E-8 -1.300458218030471E-10 5.712997155117315E-9 6.246746193490332E-12 node -8.660691006798756E-15 1.475848407835929E-14 -1.300458218030471E-10 8.62781386300499E-9 -8.655247534371692E-9 -1.261698478344465E-10 peri 1.501981047832731E-13 -1.574516994543112E-13 5.712997155117315E-9 -8.655247534371692E-9 1.037691970237675E-8 1.278901711437585E-10 i 6.332074259529528E-16 -1.098833193734136E-15 6.246746193490332E-12 -1.261698478344465E-10 1.278901711437585E-10 1.288618935079042E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.9   n/a MPO453927   146259 (2001 BL7)          Discovered 2001-Jan-19 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 Alternate Designations  2001 BL7 = 1996 TG69 = 1999 RN258  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 10:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin