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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 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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Alternate Designations
 1999 BG9 = 2001 UY152 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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