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18488 (1996 AY3)
Classification: Main-belt Asteroid          SPK-ID: 2018488
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2702944544060387 1.8973e-08  
a 3.173112688453032 1.4801e-08 au
q 2.315437925558741 6.1945e-08 au
i 17.68413819484481 4.1551e-07 deg
node 138.1346121542475 6.2489e-06 deg
peri 257.1333105163399 7.1452e-06 deg
M 213.650873314718 4.5836e-06 deg
tp 2460039.794360318636
(2023-Apr-05.29436032)
2.9655e-05 TDB
period 2064.55601449855
5.65
1.4445e-05
3.955e-08
d
yr
n .1743716312233062 1.22e-09 deg/d
Q 4.030787451347322 1.8802e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2262  
   data-arc span      9197 days (25.18 yr)  
   first obs. used      1996-01-13  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45608  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:44:05  

Additional Information
 Earth MOID = 1.39369 au 
 Jupiter MOID = 1.86422 au 
 T_jup = 3.072 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457195.5 (2015-Jun-22.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2702877628111111 1.8999e-08  
q 2.31623875131581 6.2107e-08 au
tp 2457976.339356190879
(2017-Aug-10.83935619)
2.3239e-05 TDB
node 138.1367362371257 6.2502e-06 deg
peri 257.4626772427125 7.1352e-06 deg
i 17.68133229439879 4.1565e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2262  
   data-arc span      9197 days (25.18 yr)  
   first obs. used      1996-01-13  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45608  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:44:05  

Additional Information
 Jupiter MOID = 1.86422 au 
 T_jup = 3.072 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.609729555971598E-16 -1.161885287636782E-15 -4.250545712734667E-14 -5.154815037609215E-14 5.952954369339002E-14 1.128958835355776E-15
q -1.161885287636782E-15 3.857325791286036E-15 1.824627918119077E-13 1.595911487781081E-13 -1.871099233012531E-13 -3.419738936939452E-15
tp -4.250545712734667E-14 1.824627918119077E-13 5.400452617009656E-10 -2.420694196743683E-11 8.607529836800097E-11 1.235945742591998E-12
node -5.154815037609215E-14 1.595911487781081E-13 -2.420694196743683E-11 3.906447981383671E-11 -4.049598611968086E-11 -5.545733145244307E-13
peri 5.952954369339002E-14 -1.871099233012531E-13 8.607529836800097E-11 -4.049598611968086E-11 5.091047593055662E-11 8.00835255004617E-13
i 1.128958835355776E-15 -3.419738936939452E-15 1.235945742591998E-12 -5.545733145244307E-13 8.00835255004617E-13 1.727677973499062E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.17   n/a MPCxxxxx  
diameter diameter 24.637 km 9.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.067   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

18488 (1996 AY3)          Discovered 1996-Jan-13 by Sato, N., Urata, T. at Chichibu
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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