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681 Gorgo (A909 JB)
Classification: Main-belt Asteroid          SPK-ID: 2000681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1017185073318111 2.9761e-08  
a 3.106002183118028 1.217e-08 au
q 2.790064277281916 8.9985e-08 au
i 12.57226761568935 4.4171e-06 deg
node 177.8442545437649 1.4287e-05 deg
peri 115.8191851629044 2.6448e-05 deg
M 39.14837386913982 2.1604e-05 deg
tp 2458783.073593434980
(2019-Oct-26.57359343)
0.00011992 TDB
period 1999.406325919181
5.47
1.1751e-05
3.217e-08
d
yr
n .1800534465321841 1.0582e-09 deg/d
Q 3.421940088954141 1.3408e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2949  
   data-arc span      40730 days (111.51 yr)  
   first obs. used      1909-05-13  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44403  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:19  

Additional Information
 Earth MOID = 1.80323 au 
 Jupiter MOID = 1.88182 au 
 T_jup = 3.176 
[ 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 10.7   n/a MPO435701  
diameter diameter 20.390 km 2.437 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.4606 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2013) Minor Planet Bull. 40, 189.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.240   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

681 Gorgo (A909 JB)          Discovered 1909-May-13 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A909 JB = 1949 UO = 1954 RD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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