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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2828101974641933 2.9842e-08  
a 2.236518091201275 5.9968e-09 au
q 1.604007968196402 6.6372e-08 au
i 1.336175858546246 3.7007e-06 deg
node 172.4723138015784 0.00013535 deg
peri 358.5872673291266 0.00013539 deg
M 174.1204997060224 6.5821e-06 deg
tp 2458609.612974129021
(2019-May-06.11297413)
2.1584e-05 TDB
period 1221.678835477147
3.34
4.9136e-06
1.345e-08
d
yr
n .2946764645058257 1.1852e-09 deg/d
Q 2.869028214206149 7.6928e-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 = .609521 au 
 Jupiter MOID = 2.09958 au 
 T_jup = 3.584 
[ 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 = 2.09958 au 
 T_jup = 3.584 
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 16.29   n/a E2021B10  

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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