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 ]  
20612 (1999 RT237)
Classification: Main-belt Asteroid          SPK-ID: 2020612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05116425778843397 3.812e-08  
a 3.176788615360064 1.881e-08 au
q 3.01425058370442 1.3131e-07 au
i 11.74965825627265 3.404e-06 deg
node 125.6719253163439 2.5466e-05 deg
peri 187.7004547770647 5.7896e-05 deg
M 285.5677049409172 5.2696e-05 deg
tp 2459428.102083781557
(2021-Aug-01.60208378)
0.00030293 TDB
period 2068.144614366235
5.66
1.8369e-05
5.029e-08
d
yr
n .1740690653348334 1.546e-09 deg/d
Q 3.339326647015709 1.9773e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1587  
   data-arc span      8979 days (24.58 yr)  
   first obs. used      1995-11-18  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4679  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:43:42  

Additional Information
 Earth MOID = 2.00024 au 
 Jupiter MOID = 1.90678 au 
 T_jup = 3.166 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO384931  
diameter diameter 9.729 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.142   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20612 (1999 RT237)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-09 12:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin