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 ]  
52821 (1998 RU4)
Classification: Main-belt Asteroid          SPK-ID: 2052821
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3029406083101461 4.4916e-08  
a 2.397753615173391 8.3812e-09 au
q 1.671376676414912 1.0859e-07 au
i 21.7616356076779 7.2878e-06 deg
node 359.7196480017897 1.2291e-05 deg
peri 95.25596190284486 1.7413e-05 deg
M 300.2268040227185 1.0914e-05 deg
tp 2459425.669329856241
(2021-Jul-30.16932986)
4.1474e-05 TDB
period 1356.142287908717
3.71
7.1105e-06
1.947e-08
d
yr
n .265458870510667 1.3918e-09 deg/d
Q 3.12413055393187 1.092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1060  
   data-arc span      13667 days (37.42 yr)  
   first obs. used      1983-09-12  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43464  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:48:22  

Additional Information
 Earth MOID = .835836 au 
 Jupiter MOID = 2.4103 au 
 T_jup = 3.372 
[ 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 15.17   n/a MPCxxxxx  
diameter diameter 1.936 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.471   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

52821 (1998 RU4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20030216/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 2021-Jun-14 13:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin