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18425 (1993 YL)
Classification: Main-belt Asteroid          SPK-ID: 2018425
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1559377555331229 3.4702e-08  
a 2.389865837520447 8.0659e-09 au
q 2.017195522792222 8.3497e-08 au
i 3.241092981981908 3.7032e-06 deg
node 79.62189756233356 6.5808e-05 deg
peri 123.8544331929739 6.6738e-05 deg
M 7.697513016834937 1.2021e-05 deg
tp 2459171.645959313300
(2020-Nov-18.14595931)
4.5002e-05 TDB
period 1349.455937845644
3.69
6.8317e-06
1.87e-08
d
yr
n .2667741790626574 1.3506e-09 deg/d
Q 2.762536152248673 9.3236e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1794  
   data-arc span      9893 days (27.09 yr)  
   first obs. used      1993-12-18  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50831  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:12:21  

Additional Information
 Earth MOID = 1.01478 au 
 Jupiter MOID = 2.1959 au 
 T_jup = 3.514 
[ 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 14.42   n/a E2021B10  
diameter diameter 3.873 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.966008 h n/a LCDB (Rev. 2020-October); 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 0.142   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18425 (1993 YL)          Discovered 1993-Dec-18 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 YL = 1998 BX11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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