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18393 (1992 QB)
Classification: Main-belt Asteroid          SPK-ID: 2018393
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .226273043042732 3.5329e-08  
a 2.369693251948352 1.0101e-08 au
q 1.833495548752171 8.2424e-08 au
i 24.11443514074203 5.3127e-06 deg
node 55.59297043468619 1.0523e-05 deg
peri 243.6161299445172 1.758e-05 deg
M 279.1670335388778 1.6551e-05 deg
tp 2459499.673168463350
(2021-Oct-12.17316846)
6.1996e-05 TDB
period 1332.406137768145
3.65
8.5188e-06
2.332e-08
d
yr
n .270187887758473 1.7275e-09 deg/d
Q 2.905890955144533 1.2386e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1426  
   data-arc span      17012 days (46.58 yr)  
   first obs. used      1974-08-22  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48036  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:14  

Additional Information
 Earth MOID = .917878 au 
 Jupiter MOID = 2.4474 au 
 T_jup = 3.396 
[ 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 14.38   n/a MPCxxxxx  
diameter diameter 3.855 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.1665 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.248   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18393 (1992 QB)          Discovered 1992-Aug-19 by McNaught, R. H. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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