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18591 (1997 YT11)
Classification: Main-belt Asteroid          SPK-ID: 2018591
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08186078271066709 2.3243e-08  
a 2.62378211351801 1.0463e-08 au
q 2.408997256043178 6.0765e-08 au
i 14.57324120017996 2.2531e-07 deg
node 121.1106987218109 2.981e-06 deg
peri 7.590427063668209 8.3306e-06 deg
M 158.3455708844288 7.943e-06 deg
tp 2458517.700024384585
(2019-Feb-03.20002438)
3.1896e-05 TDB
period 1552.351542569867
4.25
9.2852e-06
2.542e-08
d
yr
n .2319062339475192 1.3871e-09 deg/d
Q 2.838566970992843 1.1319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1887  
   data-arc span      9655 days (26.43 yr)  
   first obs. used      1994-04-11  
   last obs. used      2020-09-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44916  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:47  

Additional Information
 Earth MOID = 1.42486 au 
 Jupiter MOID = 2.22569 au 
 T_jup = 3.353 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.61   n/a E2021B10  
diameter diameter 5.162 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.317   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18591 (1997 YT11)          Discovered 1997-Dec-30 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 YT11 = 1994 GA9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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