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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .28221954273438 3.0595e-08  
a 2.237602278519913 6.3087e-09 au
q 1.606107186654616 6.8407e-08 au
i 1.335146646003269 3.8354e-06 deg
node 172.4911269383166 0.00016159 deg
peri 358.6106429952892 0.00016173 deg
M 115.1757022862644 6.9367e-06 deg
tp 2458609.360984272725
(2019-May-05.86098427)		 2.3281e-05 TDB
period 1222.567285171326
3.35		 5.1704e-06
1.416e-08		 d
yr
n .2944623206971803 1.2453e-09 deg/d
Q 2.86909737038521 8.0891e-09 au
   Orbit Determination Parameters
   # obs. used (total)      867  
   data-arc span      10040 days (27.49 yr)  
   first obs. used      1991-11-11  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5277  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:44  

Additional Information
 Earth MOID = .611966 au 
 Jupiter MOID = 2.1004 au 
 T_jup = 3.583 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456922.5 (2014-Sep-22.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2821258337038719 3.0402e-08  
q 1.606020500102179 6.8239e-08 au
tp 2457386.907281171871
(2015-Dec-30.40728117)		 2.3141e-05 TDB
node 172.5195228932589 0.00016221 deg
peri 358.5638132019839 0.00016244 deg
i 1.330104305438621 3.8353e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      867  
   data-arc span      10040 days (27.49 yr)  
   first obs. used      1991-11-11  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5277  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:44  

Additional Information
 Jupiter MOID = 2.1004 au 
 T_jup = 3.583 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.242895496092231E-16 -2.070125991091895E-15 -9.552069645533142E-14 -1.261038656833282E-13 1.1496742883728E-13 1.221395458186398E-15
q -2.070125991091895E-15 4.656582180243458E-15 2.173224078344456E-13 2.63009116230068E-13 -2.400418966880163E-13 -2.50148542861497E-15
tp -9.552069645533142E-14 2.173224078344456E-13 5.355046791775935E-10 -7.953160552420875E-11 2.477939514499892E-10 9.546870047135273E-13
node -1.261038656833282E-13 2.63009116230068E-13 -7.953160552420875E-11 2.631247669542849E-8 -2.631893919565411E-8 -1.934484728104711E-11
peri 1.1496742883728E-13 -2.400418966880163E-13 2.477939514499892E-10 -2.631893919565411E-8 2.63870126159569E-8 1.951949438845156E-11
i 1.221395458186398E-15 -2.50148542861497E-15 9.546870047135273E-13 -1.934484728104711E-11 1.951949438845156E-11 1.470965860448144E-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 04:12 00:02 Mars 0.094931172942419 0.0949285229940533 0.0949338229992 6.03717243529103 6.03667288211106 2424317.675333616 1.49731850326954 208.440055435264 16.1962759664212 50.8717874163932 641975.650337726 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03
1955-Sep-01 06:44 00:02 Mars 0.0793627628386621 0.0793622791047284 0.079363246585913 4.86277605081648 4.86203416294793 2435351.780462276 2.11502274378078 70.7173223961444 15.3547649102637 -74.362451631639 754298.090751743 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03
1985-Nov-03 02:04 00:01 Mars 0.0817313085665624 0.0817310263336725 0.0817315908000516 4.74724439737106 4.74650647632151 2446372.586120072 1.21659969602051 22.5273275692358 10.9675029891434 63.3731241596671 944251.389395295 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03
2016-Jan-29 09:36 < 00:01 Mars 0.0399333578022196 0.0399329817918479 0.0399337338125959 4.92708395868293 4.92562868546706 2457416.899827561 0.240855573810075 18.7756309723561 15.0278276102822 -4.96760029458139 321525.008880005 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03
2046-Mar-31 22:53 < 00:01 Mars 0.0368612908520574 0.036859783974416 0.0368627977398087 5.87411162427045 5.87278928670014 2468436.453305919 0.567609409783076 81.3473337198712 15.993561093342 23.003863523989 143223.401362115 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03
2183-Mar-11 15:07 < 00:01 Mars 0.0741209044019309 0.0741203935381787 0.0741214152845966 5.33759402172927 5.33687033704563 2518454.129819792 0.886499302951348 79.7112455296899 15.8855377592213 75.2315934195632 657580.250400549 T 18 CATAB v2.0e-lin.ifort 2019-May-30 06:03:50 2019-May-30 06:03

Alternate Designations
 1999 BG9 = 2001 UY152 
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