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30944 (1994 GD1)
Classification: Main-belt Asteroid          SPK-ID: 2030944
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2256822328159893 5.1705e-08  
a 2.935534285774094 1.1935e-08 au
q 2.273036353652706 1.5102e-07 au
i 10.90963533289162 4.4203e-06 deg
node 67.421041557 2.7384e-05 deg
peri 142.2109343423807 2.8631e-05 deg
M 147.2443146309579 8.5171e-06 deg
tp 2458645.110370631607
(2019-Jun-10.61037063)
4.3042e-05 TDB
period 1837.084625308509
5.03
1.1204e-05
3.067e-08
d
yr
n .1959626655410845 1.1951e-09 deg/d
Q 3.598032217895482 1.4629e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1426  
   data-arc span      15121 days (41.40 yr)  
   first obs. used      1979-04-25  
   last obs. used      2020-09-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4997  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:42:35  

Additional Information
 Earth MOID = 1.27831 au 
 Jupiter MOID = 1.41819 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456928.5 (2014-Sep-28.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2233188458522981 5.1938e-08  
q 2.282365005435816 1.5149e-07 au
tp 2456803.918807697327
(2014-May-26.41880770)
4.4897e-05 TDB
node 67.54261704368 2.7332e-05 deg
peri 142.2359590880764 2.8582e-05 deg
i 10.91509875236366 4.4211e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1426  
   data-arc span      15121 days (41.40 yr)  
   first obs. used      1979-04-25  
   last obs. used      2020-09-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4997  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:42:35  

Additional Information
 Jupiter MOID = 1.41819 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.697587273664264E-15 -7.853748196145081E-15 -1.031236779729394E-12 -3.79234920433196E-14 -1.852074152921757E-13 -2.406103021381284E-15
q -7.853748196145081E-15 2.295002537178049E-14 2.928174217678756E-12 1.012579790380936E-13 5.30261986968145E-13 6.747494863451454E-15
tp -1.031236779729394E-12 2.928174217678756E-12 2.01577146792821E-9 3.204506067126277E-11 4.152250700558292E-10 1.283212927096926E-13
node -3.79234920433196E-14 1.012579790380936E-13 3.204506067126277E-11 7.470246591413486E-10 -7.280299411610477E-10 -5.317624559839885E-11
peri -1.852074152921757E-13 5.30261986968145E-13 4.152250700558292E-10 -7.280299411610477E-10 8.169549082109903E-10 5.220216988293672E-11
i -2.406103021381284E-15 6.747494863451454E-15 1.283212927096926E-13 -5.317624559839885E-11 5.220216988293672E-11 1.954600254541655E-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 13.93   n/a E2021B10  
diameter diameter 9.357 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30944 (1994 GD1)          Discovered 1994-Apr-08 by Endate, K., Watanabe, K. at Kitami
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 GD1 = 1979 HB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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