Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2261965518109798 3.847e-08  
a 2.370060185099316 1.149e-08 au
q 1.833960743645359 8.8395e-08 au
i 24.11339873929455 6.376e-06 deg
node 55.59957430429107 1.1235e-05 deg
peri 243.5715460018639 2.055e-05 deg
M 225.1766226257574 1.9709e-05 deg
tp 2459499.614503700697
(2021-Oct-12.11450370)
7.4491e-05 TDB
period 1332.715622703117
3.65
9.6918e-06
2.653e-08
d
yr
n .2701251443798792 1.9644e-09 deg/d
Q 2.906159626553274 1.409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      16573 days (45.37 yr)  
   first obs. used      1974-08-22  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49683  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:46:07  

Additional Information
 Earth MOID = .919751 au 
 Jupiter MOID = 2.44763 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456899.5 (2014-Aug-30.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268656039222553 3.848e-08  
q 1.832266813972198 8.849e-08 au
tp 2456834.221919382939
(2014-Jun-25.72191938)
6.7913e-05 TDB
node 55.64843597571011 1.1243e-05 deg
peri 243.5589570776284 2.051e-05 deg
i 24.10804045226218 6.3745e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      16573 days (45.37 yr)  
   first obs. used      1974-08-22  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49683  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:46:07  

Additional Information
 Jupiter MOID = 2.44763 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.480747590346121E-15 -3.390288457691019E-15 1.799510064958404E-13 -6.529519921544463E-16 3.262661376142221E-14 4.565014548870585E-15
q -3.390288457691019E-15 7.830536395854812E-15 -3.073241677883093E-13 3.477669429448896E-16 -4.760465959497457E-14 -9.913222789990263E-15
tp 1.799510064958404E-13 -3.073241677883093E-13 4.612210820494594E-9 -1.685899074204248E-11 1.182526209943461E-9 1.035245130956689E-11
node -6.529519921544463E-16 3.477669429448896E-16 -1.685899074204248E-11 1.263960759480606E-10 -1.190275446005063E-10 -2.088536706094827E-11
peri 3.262661376142221E-14 -4.760465959497457E-14 1.182526209943461E-9 -1.190275446005063E-10 4.206547436094504E-10 2.169775301667354E-11
i 4.565014548870585E-15 -9.913222789990263E-15 1.035245130956689E-11 -2.088536706094827E-11 2.169775301667354E-11 4.063406338769175E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO400186  
diameter diameter 3.855 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-18 22:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin