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 ]  
101061 (1998 RL4)
Classification: Main-belt Asteroid          SPK-ID: 2101061
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 .1958110255433835 3.684e-08  
a 2.298988065188907 1.1183e-08 au
q 1.848820854432268 8.6738e-08 au
i 22.68022932059215 5.322e-06 deg
node 354.4748268606528 1.0611e-05 deg
peri 264.2823423446408 2.3386e-05 deg
M 219.8932644389371 2.6275e-05 deg
tp 2459696.018662125569
(2022-Apr-26.51866213)
9.4864e-05 TDB
period 1273.220146418001
3.49
9.2901e-06
2.543e-08
d
yr
n .2827476465973319 2.0631e-09 deg/d
Q 2.749155275945546 1.3373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      8757 days (23.98 yr)  
   first obs. used      1997-03-13  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54001  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:01  

Additional Information
 Earth MOID = .982194 au 
 Jupiter MOID = 2.57466 au 
 T_jup = 3.466 
[ 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 15.8   n/a MPO449612  
diameter diameter 4.196 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101061 (1998 RL4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 RL4 = 1997 ET55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-23 03:34 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin