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18368 Flandrau (1991 GZ1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2018368
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05423785230342176 1.7024e-08  
a 1.927823035581327 6.9418e-09 au
q 1.823262054510333 3.2829e-08 au
i 23.79060120479049 1.1144e-06 deg
node 48.24224346576541 2.5604e-06 deg
peri 106.1613913089058 1.291e-05 deg
M 143.0148746774665 1.4021e-05 deg
tp 2459008.101195911108
(2020-Jun-07.60119591)
3.6806e-05 TDB
period 977.6855015070105
2.68
5.2807e-06
1.446e-08
d
yr
n .3682165680529105 1.9888e-09 deg/d
Q 2.032384016652321 7.3183e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      11064 days (30.29 yr)  
   first obs. used      1991-04-15  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:32:47  

Additional Information
 Earth MOID = .875525 au 
 Jupiter MOID = 2.9987 au 
 T_jup = 3.811 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457122.5 (2015-Apr-10.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05447325258651697 1.7032e-08  
q 1.822636906399133 3.2872e-08 au
tp 2457052.858745890522
(2015-Jan-30.35874589)
3.161e-05 TDB
node 48.26500612277725 2.5605e-06 deg
peri 106.0629907502973 1.2851e-05 deg
i 23.79299525152362 1.1144e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      11064 days (30.29 yr)  
   first obs. used      1991-04-15  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:32:47  

Additional Information
 Jupiter MOID = 2.9987 au 
 T_jup = 3.811 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.901035381978556E-16 -5.486288980544266E-16 4.469574965302382E-14 1.223427879099179E-14 -1.794776795500506E-15 -8.477446585637196E-15
q -5.486288980544266E-16 1.080548976577389E-15 -1.388750104864934E-14 -2.310336028623045E-14 3.248455513893451E-14 1.609121623167714E-14
tp 4.469574965302382E-14 -1.388750104864934E-14 9.991855842392019E-10 1.146523181571285E-12 3.974881660859411E-10 1.079479658187495E-12
node 1.223427879099179E-14 -2.310336028623045E-14 1.146523181571285E-12 6.555921672278871E-12 -5.750121339848163E-12 -1.420946602944083E-12
peri -1.794776795500506E-15 3.248455513893451E-14 3.974881660859411E-10 -5.750121339848163E-12 1.651579693359662E-10 2.432945061451694E-12
i -8.477446585637196E-15 1.609121623167714E-14 1.079479658187495E-12 -1.420946602944083E-12 2.432945061451694E-12 1.241961749325646E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.74   n/a MPO636341  
diameter diameter 1.923 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.777 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2012) Minor Planet Bull. 39, 158-167.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 167-172.]
geometric albedo albedo 0.757   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18368 Flandrau           Discovered 1991 Apr. 15 by C. S. Shoemaker and D. H. Levy at Palomar.
The Flandrau Science Center, opened in Nov. 1975, is surrounded by the huge astronomical infrastructure of the University of Arizona and plays a key role in the University's public education effort. It has launched the careers of many astronomers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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