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15723 Girraween (1990 SA2)
Classification: Main-belt Asteroid          SPK-ID: 2015723
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324992899794721 2.9274e-08  
a 2.274177893749289 6.2756e-09 au
q 1.972850937540497 6.7303e-08 au
i 1.425513113313456 3.2599e-06 deg
node 359.083711291232 0.00012689 deg
peri 7.868857968011615 0.00012751 deg
M 356.7985349110386 1.3586e-05 deg
tp 2459407.639901400132
(2021-Jul-12.13990140)
4.7299e-05 TDB
period 1252.665386817784
3.43
5.1851e-06
1.42e-08
d
yr
n .2873872015531044 1.1896e-09 deg/d
Q 2.575504849958081 7.1071e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1991  
   data-arc span      13802 days (37.79 yr)  
   first obs. used      1983-09-04  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52771  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:56:43  

Additional Information
 Earth MOID = .970544 au 
 Jupiter MOID = 2.88326 au 
 T_jup = 3.598 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457018.5 (2014-Dec-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321896694204415 2.9145e-08  
q 1.973377483910522 6.6978e-08 au
tp 2456901.641851737550
(2014-Sep-01.14185174)
4.3378e-05 TDB
node 359.1320913156621 0.00012682 deg
peri 7.734086197109461 0.00012744 deg
i 1.427151299303655 3.2581e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1991  
   data-arc span      13802 days (37.79 yr)  
   first obs. used      1983-09-04  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52771  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:56:43  

Additional Information
 Jupiter MOID = 2.88326 au 
 T_jup = 3.598 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.494405610261629E-16 -1.945847572319395E-15 -3.30122871495088E-14 3.430386259058071E-15 -1.463073142667034E-14 1.329547462430414E-16
q -1.945847572319395E-15 4.486095286658615E-15 1.508344400517216E-13 -8.274684959290572E-15 5.544079417195952E-14 -2.72335313746609E-16
tp -3.30122871495088E-14 1.508344400517216E-13 1.881687841609761E-9 -9.114902335073118E-12 5.559195888822527E-10 1.216880512152625E-13
node 3.430386259058071E-15 -8.274684959290572E-15 -9.114902335073118E-12 1.608291092382147E-8 -1.608020695597014E-8 4.209258234083157E-12
peri -1.463073142667034E-14 5.544079417195952E-14 5.559195888822527E-10 -1.608020695597014E-8 1.624187589189652E-8 -4.172021470915856E-12
i 1.329547462430414E-16 -2.72335313746609E-16 1.216880512152625E-13 4.209258234083157E-12 -4.172021470915856E-12 1.0615083016224E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.65   n/a E2021B10  
diameter diameter 4.058 km 0.768 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.155   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

15723 Girraween           Discovered 1990 Sept. 20 by T. Seki at Geisei.
Girraween is an Australian Aboriginal word meaning "Place of flowers". In southeastern Queensland, Girraween National Park is famous for massive granite outcrops, spectacular wild flowers and a wide variety of wildlife. The name was suggested by E. Kato.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070601/MPCPages.arcLast Updated: 2007-06-06

Alternate Designations
 1990 SA2 = 1983 RA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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