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 ]  
18437 (1994 JR)
Classification: Main-belt Asteroid          SPK-ID: 2018437
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1195869148845005 1.4157e-08  
a 2.586094330008926 1.0591e-08 au
q 2.276831287482859 3.5011e-08 au
i 15.09169491954023 1.0196e-06 deg
node 82.68546206876103 2.5202e-06 deg
peri 170.1250623640449 9.8916e-06 deg
M 112.989248479168 7.8276e-06 deg
tp 2458723.740243496246
(2019-Aug-28.24024350)
3.2086e-05 TDB
period 1519.025169664667
4.16
9.3311e-06
2.555e-08
d
yr
n .2369940980500488 1.4558e-09 deg/d
Q 2.895357372534993 1.1857e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2265  
   data-arc span      10307 days (28.22 yr)  
   first obs. used      1992-11-24  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43594  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:18  

Additional Information
 Earth MOID = 1.26148 au 
 Jupiter MOID = 2.16626 au 
 T_jup = 3.364 
[ 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 13.50   n/a E2021B10  
diameter diameter 5.778 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18437 (1994 JR)          Discovered 1994-May-05 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 JR = 1998 GU6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-17 04:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin