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18884 (1999 YE9)
Classification: Main-belt Asteroid          SPK-ID: 2018884
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2000667836891246 2.0949e-08  
a 2.583234763652837 1.1222e-08 au
q 2.066415292974878 5.4837e-08 au
i 12.2823899603947 6.3147e-07 deg
node 284.3869160311206 2.2426e-06 deg
peri 27.32138699215008 4.5555e-06 deg
M 179.6045085651288 5.5643e-06 deg
tp 2458443.912824821475
(2018-Nov-21.41282482)
1.9709e-05 TDB
period 1516.506379713185
4.15
9.882e-06
2.706e-08
d
yr
n .2373877253771174 1.5469e-09 deg/d
Q 3.100054234330797 1.3467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2028  
   data-arc span      25031 days (68.53 yr)  
   first obs. used      1952-08-24  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47605  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:04:45  

Additional Information
 Earth MOID = 1.05727 au 
 Jupiter MOID = 2.17902 au 
 T_jup = 3.363 
[ 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 13.21   n/a E2021B10  
diameter diameter 5.866 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.366   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18884 (1999 YE9)          Discovered 1999-Dec-30 by Korlevic, K. at Visnjan
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 YE9 = 1981 RD = 1988 DV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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