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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1559662593624314 3.3964e-08  
a 2.390216640632103 7.722e-09 au
q 2.017423492126877 8.1343e-08 au
i 3.240901461480806 3.6946e-06 deg
node 79.62156727926467 6.4531e-05 deg
peri 123.9215436417811 6.5483e-05 deg
M 59.92456809604501 1.2011e-05 deg
tp 2459171.823972197354
(2020-Nov-18.32397220)
4.461e-05 TDB
period 1349.753074220166
3.70
6.5409e-06
1.791e-08
d
yr
n .2667154510524036 1.2925e-09 deg/d
Q 2.763009789137329 8.9264e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1853  
   data-arc span      10056 days (27.53 yr)  
   first obs. used      1993-12-18  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50323  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:37:12  

Additional Information
 Earth MOID = 1.01652 au 
 Jupiter MOID = 2.19443 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 14.41   n/a MPCxxxxx  
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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