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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2001156693700594 2.0562e-08  
a 2.58302444129099 1.1157e-08 au
q 2.06612077622282 5.4032e-08 au
i 12.28152985297017 6.3044e-07 deg
node 284.3829839280453 2.2392e-06 deg
peri 27.362716502206 4.5221e-06 deg
M 226.0831333736465 5.8093e-06 deg
tp 2459960.558279922853
(2023-Jan-16.05827992)
2.7556e-05 TDB
period 1516.321176620682
4.15
9.8242e-06
2.69e-08
d
yr
n .2374167198550288 1.5382e-09 deg/d
Q 3.099928106359159 1.3389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2123  
   data-arc span      25128 days (68.80 yr)  
   first obs. used      1952-08-24  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46864  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:05:00  

Additional Information
 Earth MOID = 1.05843 au 
 Jupiter MOID = 2.17855 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 13.23   n/a MPCxxxxx  
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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