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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 ]

[ show orbit diagram ]
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

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