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2638 Gadolin (1939 SG)
Classification: Main-belt Asteroid          SPK-ID: 2002638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08160285850924248 4.3704e-08  
a 2.556521963352741 1.0949e-08 au
q 2.347902463301497 1.1088e-07 au
i 14.34440670028539 5.0212e-06 deg
node 245.8538429989996 1.7319e-05 deg
peri 172.0044601898845 3.2524e-05 deg
M 230.0321755770428 2.775e-05 deg
tp 2459539.521474234192
(2021-Nov-21.02147423)
0.00011559 TDB
period 1493.044386838508
4.09
9.5913e-06
2.626e-08
d
yr
n .2411180827398527 1.5489e-09 deg/d
Q 2.765141463403986 1.1842e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2099  
   data-arc span      29626 days (81.11 yr)  
   first obs. used      1939-09-19  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:07:27  

Additional Information
 Earth MOID = 1.36132 au 
 Jupiter MOID = 2.54946 au 
 T_jup = 3.389 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9   n/a MPO473801  
diameter diameter 12.108 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.2174 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Hayes-Gehrke, M.N.; Yates, E.; Sewell, C.; Tapscott, E.; et al. (2019) Minor Planet Bull. 46-4, in press.]
geometric albedo albedo 0.284   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2638 Gadolin (1939 SG)          Discovered 1939-Sep-19 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1939 SG = 1964 WG = 1978 GF = 1980 UM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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