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11894 (1991 GW)
Classification: Main-belt Asteroid          SPK-ID: 2011894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1883935302098672 4.0184e-08  
a 2.357605200005882 9.5097e-09 au
q 1.913447633535634 9.759e-08 au
i 7.953327867872242 3.9875e-06 deg
node 38.28713740460329 3.0385e-05 deg
peri 172.6531034162273 3.3353e-05 deg
M 255.543766852961 1.7231e-05 deg
tp 2458984.151506287042
(2020-May-14.65150629)
6.4695e-05 TDB
period 1322.224036826187
3.62
8e-06
2.19e-08
d
yr
n .2722685339045336 1.6473e-09 deg/d
Q 2.801762766476129 1.1301e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1544  
   data-arc span      10475 days (28.68 yr)  
   first obs. used      1991-04-03  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53313  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:20:21  

Additional Information
 Earth MOID = .908176 au 
 Jupiter MOID = 2.16236 au 
 T_jup = 3.516 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456710.5 (2014-Feb-22.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1885557911576309 4.0108e-08  
q 1.912868457278623 9.741e-08 au
tp 2456340.430182096063
(2013-Feb-16.93018210)
5.6341e-05 TDB
node 38.3075158465184 3.0398e-05 deg
peri 172.7129787787981 3.3377e-05 deg
i 7.952298443229397 3.9865e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1544  
   data-arc span      10475 days (28.68 yr)  
   first obs. used      1991-04-03  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53313  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:20:21  

Additional Information
 Jupiter MOID = 2.16236 au 
 T_jup = 3.516 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.608689643559598E-15 -3.896163195460889E-15 -8.388262331325646E-13 6.308588119096238E-15 -1.742831311725085E-13 -9.341194212545164E-16
q -3.896163195460889E-15 9.488794989485529E-15 2.161115723488748E-12 -1.62333168241973E-14 4.565914423915581E-13 2.610976538394802E-15
tp -8.388262331325646E-13 2.161115723488748E-12 3.174253112209892E-9 -1.443874250477133E-11 7.934590653836804E-10 5.737775168796344E-12
node 6.308588119096238E-15 -1.62333168241973E-14 -1.443874250477133E-11 9.240586649407668E-10 -9.185230330192843E-10 -4.222327166898568E-12
peri -1.742831311725085E-13 4.565914423915581E-13 7.934590653836804E-10 -9.185230330192843E-10 1.114050238647709E-9 5.597680615199811E-12
i -9.341194212545164E-16 2.610976538394802E-15 5.737775168796344E-12 -4.222327166898568E-12 5.597680615199811E-12 1.58925741681446E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO365393  
diameter diameter 7.298 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11894 (1991 GW)          Discovered 1991-Apr-03 by Kawasato, N. at Uenohara
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 GW = 1996 TU4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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