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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08127426310102748 1.191e-08  
a 2.55564612906945 1.0694e-08 au
q 2.347937873182337 3.4326e-08 au
i 14.33697962467468 3.4595e-07 deg
node 245.8084050994898 3.6056e-06 deg
peri 172.3800693340526 1.6285e-05 deg
M 277.8809836595515 1.7892e-05 deg
tp 2459540.900933484729
(2021-Nov-22.40093348)
7.4728e-05 TDB
period 1492.277203448943
4.09
9.3666e-06
2.564e-08
d
yr
n .241242042140676 1.5142e-09 deg/d
Q 2.763354384956563 1.1563e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2238  
   data-arc span      29693 days (81.30 yr)  
   first obs. used      1939-09-19  
   last obs. used      2021-01-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40554  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:03:19  

Additional Information
 Earth MOID = 1.36066 au 
 Jupiter MOID = 2.55094 au 
 T_jup = 3.390 
[ 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. 2020-October); Warner et al., 2009 Published Reference List:
[Hayes-Gehrke, M.N.; Yates, E.; Sewell, C.; Tapscott, E.; et al. (2019) Minor Planet Bull. 46, 384.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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