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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 ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1882836596215129 3.6983e-08  
a 2.357124735119329 6.534e-09 au
q 1.913316663806672 8.785e-08 au
i 7.95326536374052 3.7978e-06 deg
node 38.28013200647578 2.2553e-05 deg
peri 172.72587203 2.422e-05 deg
M 4.403044439374423 7.8998e-06 deg
tp 2458984.333245523040
(2020-May-14.83324552)		 2.9013e-05 TDB
period 1321.819866195242
3.62		 5.4962e-06
1.505e-08		 d
yr
n .2723517849949045 1.1324e-09 deg/d
Q 2.800932806431985 7.7642e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2009  
   data-arc span      10734 days (29.39 yr)  
   first obs. used      1991-04-03  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48584  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:37  

Additional Information
 Earth MOID = .907814 au 
 Jupiter MOID = 2.16235 au 
 T_jup = 3.517 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457297.5 (2015-Oct-02.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1888759028226202 3.6931e-08  
q 1.91168880488823 8.7777e-08 au
tp 2457661.963198887194
(2016-Sep-30.46319889)		 2.9945e-05 TDB
node 38.3021555074757 2.2558e-05 deg
peri 172.66729495749 2.4217e-05 deg
i 7.953492425024471 3.7976e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2009  
   data-arc span      10734 days (29.39 yr)  
   first obs. used      1991-04-03  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48584  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:37  

Additional Information
 Jupiter MOID = 2.16235 au 
 T_jup = 3.517 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.363914813643595E-15 -3.235850369579173E-15 -1.641716567375075E-13 5.408649411047547E-16 -7.921155940543398E-15 -1.13240363948811E-15
q -3.235850369579173E-15 7.704775578559522E-15 3.431194912937284E-13 -1.475560323555603E-15 4.088043319232735E-15 2.605034838569919E-15
tp -1.641716567375075E-13 3.431194912937284E-13 8.966911718044253E-10 -3.571971700484339E-12 2.691364344755863E-10 1.757543162255441E-12
node 5.408649411047547E-16 -1.475560323555603E-15 -3.571971700484339E-12 5.088501111008148E-10 -5.046570089270219E-10 -1.639690271650043E-11
peri -7.921155940543398E-15 4.088043319232735E-15 2.691364344755863E-10 -5.046570089270219E-10 5.864722913069185E-10 1.673750566794269E-11
i -1.13240363948811E-15 2.605034838569919E-15 1.757543162255441E-12 -1.639690271650043E-11 1.673750566794269E-11 1.442203744043334E-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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