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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1017184796480336 3.5134e-08  
a 3.106002194615758 1.4669e-08 au
q 2.790064373595988 1.1121e-07 au
i 12.57226643481453 4.4654e-06 deg
node 177.8442269410297 1.922e-05 deg
peri 115.8192185786449 2.956e-05 deg
M 39.14836355421613 2.2854e-05 deg
tp 2458783.073649515805
(2019-Oct-26.57364952)
0.00012661 TDB
period 1999.406337021218
5.47
1.4165e-05
3.878e-08
d
yr
n .1800534455324073 1.2756e-09 deg/d
Q 3.421940015635529 1.6162e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2521  
   data-arc span      40375 days (110.54 yr)  
   first obs. used      1909-05-13  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:33:52  

Additional Information
 Earth MOID = 1.80323 au 
 Jupiter MOID = 1.88182 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456115.5 (2012-Jul-07.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028650949542911 3.4776e-08  
q 2.785920193821394 1.1015e-07 au
tp 2456793.680524475697
(2014-May-16.18052448)
0.00012479 TDB
node 178.0034076610672 1.9195e-05 deg
peri 117.7475469234577 2.9512e-05 deg
i 12.58113783804983 4.47e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2521  
   data-arc span      40375 days (110.54 yr)  
   first obs. used      1909-05-13  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:33:52  

Additional Information
 Jupiter MOID = 1.88182 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.209347314555888E-15 -3.804041959046628E-15 -2.349908228026243E-13 -3.08153796842698E-15 -3.609585623019046E-14 -1.426096502255872E-15
q -3.804041959046628E-15 1.213314430325632E-14 8.057597714648379E-13 1.185791511213933E-14 1.114302926412765E-13 5.060192588207621E-15
tp -2.349908228026243E-13 8.057597714648379E-13 1.557224689852431E-8 1.535646252466241E-11 2.818892636717726E-9 2.97985599845148E-13
node -3.08153796842698E-15 1.185791511213933E-14 1.535646252466241E-11 3.684401895251398E-10 -3.564552135517417E-10 1.411299995476524E-11
peri -3.609585623019046E-14 1.114302926412765E-13 2.818892636717726E-9 -3.564552135517417E-10 8.709464130829632E-10 -1.375482835889025E-11
i -1.426096502255872E-15 5.060192588207621E-15 2.97985599845148E-13 1.411299995476524E-11 -1.375482835889025E-11 1.998050555527968E-11

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

[ 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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