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 ]  
118388 (1999 JR42)
Classification: Main-belt Asteroid          SPK-ID: 2118388
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1538200582865827 4.1966e-08  
a 2.411474887503137 8.4167e-09 au
q 2.040541679750774 1.028e-07 au
i 1.47603307115929 3.7583e-06 deg
node 254.5930829444366 0.00016822 deg
peri 285.7193679463966 0.00016868 deg
M 315.094129242905 1.2294e-05 deg
tp 2459371.117338755814
(2021-Jun-05.61733876)
4.6927e-05 TDB
period 1367.799820302746
3.74
7.161e-06
1.961e-08
d
yr
n .2631964083167656 1.3779e-09 deg/d
Q 2.782408095255501 9.7114e-09 au
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      7979 days (21.85 yr)  
   first obs. used      1999-05-10  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:57:03  

Additional Information
 Earth MOID = 1.04376 au 
 Jupiter MOID = 2.1819 au 
 T_jup = 3.503 
[ 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 16.0   n/a MPO459558  
diameter diameter 1.682 km 0.438 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.273   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118388 (1999 JR42)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1999 JR42 = 2001 XW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-15 06:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin