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JPL Small-Body Database Browser
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11209 (1999 GP18)
Classification: Main-belt Asteroid          SPK-ID: 2011209
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0510224002986614 3.8054e-08  
a 2.990268884051349 2.0105e-08 au
q 2.83769818804865 1.154e-07 au
i 11.5653545838562 4.3437e-06 deg
node 104.6521881581672 2.2254e-05 deg
peri 151.9946021052779 4.9243e-05 deg
M 257.4638041660822 4.423e-05 deg
tp 2459138.445760746822
(2020-Oct-15.94576075)
0.00023246 TDB
period 1888.703518731431
5.17
1.9048e-05
5.215e-08
d
yr
n .1906069409145793 1.9223e-09 deg/d
Q 3.142839580054049 2.1131e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1619  
   data-arc span      10513 days (28.78 yr)  
   first obs. used      1990-07-28  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43255  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:54:06  

Additional Information
 Earth MOID = 1.82648 au 
 Jupiter MOID = 1.95882 au 
 T_jup = 3.224 
[ 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 12.9   n/a MPO384855  
diameter diameter 9.593 km 0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.21707 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.175   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11209 (1999 GP18)          Discovered 1999-Apr-15 by LINEAR at Socorro
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 GP18 = 1990 OB6 = 1993 BA15 = 1995 QW1 = 1998 BV10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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