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
JPL Small-Body Database Browser
Search: [ help ]  
18416 (1993 QW)
Classification: Main-belt Asteroid          SPK-ID: 2018416
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2280276479488606 3.8506e-08  
a 2.265487791976216 8.4914e-09 au
q 1.748893939315022 8.9341e-08 au
i 25.58910678867105 4.7225e-06 deg
node 157.057208392451 9.3106e-06 deg
peri 161.0383641083155 1.3221e-05 deg
M 18.24345693966769 8.9323e-06 deg
tp 2459137.383101286591
(2020-Oct-14.88310129)
3.0847e-05 TDB
period 1245.49221191853
3.41
7.0024e-06
1.917e-08
d
yr
n .2890423533403421 1.6251e-09 deg/d
Q 2.78208164463741 1.0428e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1201  
   data-arc span      16124 days (44.15 yr)  
   first obs. used      1976-11-18  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4792  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:28:50  

Additional Information
 Earth MOID = .746397 au 
 Jupiter MOID = 2.62896 au 
 T_jup = 3.456 
[ 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 15.24   n/a E2021B10  
diameter diameter 2.070 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.716   0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18416 (1993 QW)          Discovered 1993-Aug-22 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 QW = 1986 PD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 06:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin