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JPL Small-Body Database Browser
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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08160284166247739 4.8778e-08  
a 2.556521961453473 1.1939e-08 au
q 2.347902504626339 1.2205e-07 au
i 14.34440557972119 5.2976e-06 deg
node 245.8538368912091 1.8226e-05 deg
peri 172.0044615230651 3.4017e-05 deg
M 230.0321791965131 2.8306e-05 deg
tp 2459539.521458622330
(2021-Nov-21.02145862)
0.00011763 TDB
period 1493.04438517471
4.09
1.0459e-05
2.864e-08
d
yr
n .2411180830085466 1.6891e-09 deg/d
Q 2.765141418280607 1.2914e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1802  
   data-arc span      29187 days (79.91 yr)  
   first obs. used      1939-09-19  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44079  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:25:58  

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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