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20057 (1993 GC)
Classification: Main-belt Asteroid          SPK-ID: 2020057
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1076282563193509 1.3476e-08  
a 2.693833030195016 1.0798e-08 au
q 2.403900478339652 3.557e-08 au
i 12.27845949614007 9.6873e-07 deg
node 200.0809577454218 3.3105e-06 deg
peri 22.07504700902509 1.0975e-05 deg
M 78.58360708965557 9.5324e-06 deg
tp 2458847.979890596928
(2019-Dec-30.47989060)
4.2391e-05 TDB
period 1614.932733239365
4.42
9.7103e-06
2.659e-08
d
yr
n .2229195015930368 1.3404e-09 deg/d
Q 2.983765582050379 1.1961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2395  
   data-arc span      13429 days (36.77 yr)  
   first obs. used      1984-03-07  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:12:14  

Additional Information
 Earth MOID = 1.40006 au 
 Jupiter MOID = 1.98837 au 
 T_jup = 3.330 
[ show covariance matrix ]

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 13.11   n/a E2021B10  
diameter diameter 7.361 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.074 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.225   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20057 (1993 GC)          Discovered 1993-Apr-13 by Otomo, S. at Kiyosato
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 GC = 1999 TN15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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