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18532 (1996 XW2)
Classification: Main-belt Asteroid          SPK-ID: 2018532
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269741973606341 3.7251e-08  
a 2.668385427129321 1.0644e-08 au
q 2.329569329270763 9.9033e-08 au
i 13.13562492436395 4.3689e-06 deg
node 74.16304293052174 1.7228e-05 deg
peri 52.5028588941242 2.5065e-05 deg
M 150.8595242228326 1.7287e-05 deg
tp 2458533.322333450508
(2019-Feb-18.82233345)
7.5395e-05 TDB
period 1592.103390191293
4.36
9.5261e-06
2.608e-08
d
yr
n .2261159684841482 1.3529e-09 deg/d
Q 3.007201524987879 1.1995e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1574  
   data-arc span      9534 days (26.10 yr)  
   first obs. used      1994-06-08  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51617  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:31:06  

Additional Information
 Earth MOID = 1.36979 au 
 Jupiter MOID = 2.18484 au 
 T_jup = 3.333 
[ show covariance matrix ]

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 14.26   n/a E2021B10  
diameter diameter 3.872 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.464 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.225   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18532 (1996 XW2)          Discovered 1996-Dec-03 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 XW2 = 1994 LJ9 = 1998 HU122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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