+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   91227 (1999 BG9) Classification: Mars-crossing Asteroid          SPK-ID: 2091227 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2822195470101299 2.9829e-08   a 2.237602280156188 6.0211e-09 au q 1.606107178261675 6.6375e-08 au i 1.335147279454465 3.6986e-06 deg node 172.4915398905334 0.00013547 deg peri 358.6102351605166 0.00013552 deg M 115.1757005392203 6.5143e-06 deg tp 2458609.360989776684 (2019-May-05.86098978) 2.1663e-05 TDB period 1222.567286512352 3.35 4.9346e-06 1.351e-08 d yr n .2944623203741863 1.1885e-09 deg/d Q 2.869097382050701 7.7203e-09 au   Orbit Determination Parameters    # obs. used (total)      948      data-arc span      10568 days (28.93 yr)      first obs. used      1991-11-11      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51396      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:40:40   Additional Information  Earth MOID = .611966 au   Jupiter MOID = 2.1004 au   T_jup = 3.583  [ hide covariance matrix ] Orbital Elements at Epoch 2457513.5 (2016-May-05.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .282159088135938 2.981e-08   q 1.605705319036785 6.6284e-08 au tp 2457386.724461969784 (2015-Dec-30.22446197) 2.088e-05 TDB node 172.5493997715508 0.00013557 deg peri 358.4681071511822 0.00013562 deg i 1.334502021278027 3.6978e-06 deg   Orbit Determination Parameters    # obs. used (total)      948      data-arc span      10568 days (28.93 yr)      first obs. used      1991-11-11      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51396      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:40:40   Additional Information  Jupiter MOID = 2.1004 au   T_jup = 3.583  Orbit Covariance (6×6)   e q tp node peri i e 8.886154709551012E-16 -1.971831836645906E-15 -1.620887939210066E-13 -4.733745473653158E-14 6.14779507850196E-15 3.859176236312184E-16 q -1.971831836645906E-15 4.393569187376562E-15 3.669256527112691E-13 1.704797228600226E-13 -7.715824544691657E-14 -1.939405439252496E-15 tp -1.620887939210066E-13 3.669256527112691E-13 4.359624315905748E-10 -2.174271731477098E-11 1.445904157685308E-10 6.960361622326231E-13 node -4.733745473653158E-14 1.704797228600226E-13 -2.174271731477098E-11 1.837985719595629E-8 -1.836570347289075E-8 -1.018961007001809E-10 peri 6.14779507850196E-15 -7.715824544691657E-14 1.445904157685308E-10 -1.836570347289075E-8 1.839230135567249E-8 1.018111235605085E-10 i 3.859176236312184E-16 -1.939405439252496E-15 6.960361622326231E-13 -1.018961007001809E-10 1.018111235605085E-10 1.367366620044602E-11 [ 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 16.2   n/a MPO422268   91227 (1999 BG9)          Discovered 1999-Jan-22 by Korlevic, K. at Visnjan Reference: 20041028/Numbers.arc Last Updated: 2004-10-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1925-Jun-16 04:13 00:01 Mars 0.0949312943815818 0.0949287707852697 0.0949338180770548 6.03717094947445 6.0366713968106 2424317.675357454 1.42492856267879 198.755409960033 13.1218823175052 50.8727870668025 790166.868372127 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 1955-Sep-01 06:44 00:02 Mars 0.0793629882444871 0.0793625493993784 0.0793634271034858 4.86277582104886 4.86203393525251 2435351.780497405 2.01950693262825 67.1528882453357 12.3755592025384 -74.1277105570846 922477.637081453 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 1985-Nov-03 02:04 00:01 Mars 0.0817314935112324 0.0817312386093842 0.0817317484134708 4.74724446529834 4.74650654592928 2446372.586133747 1.16349839245469 20.0229246393638 10.4096721399265 64.7601454445271 1000156.46814127 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 2016-Jan-29 09:36 < 00:01 Mars 0.0399335794607507 0.0399332178096144 0.0399339411119233 4.92708362842096 4.92562836318646 2457416.899823462 0.237484563102706 18.2654424727928 13.5871631039362 -13.7262704472609 338052.509479741 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 2046-Mar-31 22:53 < 00:01 Mars 0.0368614123662091 0.0368599756876995 0.0368628490542797 5.87411324116355 5.87279090831689 2468436.453347446 0.553629620469285 77.7704636033787 14.8333781017968 23.3583730754088 155502.106464314 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 2183-Mar-11 15:07 < 00:01 Mars 0.0741212111018312 0.0741207663322999 0.074121655891641 5.33759774928766 5.33687406810415 2518454.129713718 0.870274585503171 78.1894632423914 12.8390897969051 76.4416124573414 816227.309264973 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 20:40:44 2020-Nov-12 20:40 Alternate Designations  1999 BG9 = 2001 UY152  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 08:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin