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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1889969905654934 1.5243e-08  
a 2.357957573803421 6.4678e-09 au
q 1.912310688473462 3.6138e-08 au
i 7.953457117786331 3.4687e-07 deg
node 38.21696979234921 5.4465e-06 deg
peri 172.8455761359819 6.7188e-06 deg
M 112.0997195562232 5.358e-06 deg
tp 2458984.682846690908
(2020-May-15.18284669)
1.9541e-05 TDB
period 1322.520482461305
3.62
5.4415e-06
1.49e-08
d
yr
n .2722075043631946 1.12e-09 deg/d
Q 2.80360445913338 7.6902e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2040  
   data-arc span      11035 days (30.21 yr)  
   first obs. used      1991-04-03  
   last obs. used      2021-06-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48989  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:39:14  

Additional Information
 Earth MOID = .907423 au 
 Jupiter MOID = 2.15752 au 
 T_jup = 3.516 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457354.5 (2015-Nov-28.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1888889198358836 1.5197e-08  
q 1.911774210979425 3.594e-08 au
tp 2457661.913296165802
(2016-Sep-30.41329617)
2.0074e-05 TDB
node 38.30129617198226 5.4481e-06 deg
peri 172.6496118117212 6.7214e-06 deg
i 7.953423490441559 3.4723e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2040  
   data-arc span      11035 days (30.21 yr)  
   first obs. used      1991-04-03  
   last obs. used      2021-06-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48989  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:39:14  

Additional Information
 Jupiter MOID = 2.15752 au 
 T_jup = 3.516 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.309634248842725E-16 -5.405642107597501E-16 -2.208004224624253E-13 5.628760867147074E-15 -4.557426777752204E-14 -9.131099753064572E-16
q -5.405642107597501E-16 1.291682227022713E-15 4.963207003083919E-13 -1.353552933194196E-14 1.000462874353542E-13 2.12985407964947E-15
tp -2.208004224624253E-13 4.963207003083919E-13 4.029720839229055E-10 4.419614829910187E-12 8.281777359281038E-11 9.916515841983864E-13
node 5.628760867147074E-15 -1.353552933194196E-14 4.419614829910187E-12 2.968133169828988E-11 -2.739851957589623E-11 1.254330226902387E-12
peri -4.557426777752204E-14 1.000462874353542E-13 8.281777359281038E-11 -2.739851957589623E-11 4.517736293321115E-11 -9.599803941818197E-13
i -9.131099753064572E-16 2.12985407964947E-15 9.916515841983864E-13 1.254330226902387E-12 -9.599803941818197E-13 1.205700248716608E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.29   n/a E2021B10  
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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