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91227 (1999 BG9)
Classification: Mars-crossing Asteroid          SPK-ID: 2091227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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.arcLast Updated: 2004-10-29

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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 ]
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