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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1017184835891131 3.3671e-08  
a 3.106002193168377 1.397e-08 au
q 2.79006436005483 1.055e-07 au
i 12.57226684288504 4.4478e-06 deg
node 177.844234691594 1.8303e-05 deg
peri 115.8192106162332 2.8949e-05 deg
M 39.14836455592533 2.2425e-05 deg
tp 2458783.073644104385
(2019-Oct-26.57364410)
0.00012431 TDB
period 1999.406335623649
5.47
1.349e-05
3.693e-08
d
yr
n .1800534456582633 1.2148e-09 deg/d
Q 3.421940026281924 1.5391e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2619  
   data-arc span      40625 days (111.23 yr)  
   first obs. used      1909-05-13  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46293  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:23  

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. 2019-August); 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

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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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