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 ]  
20617 (1999 SA7)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020617
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06063658409193848 1.4079e-08  
a 3.227511259574033 2.1076e-08 au
q 3.031806001675194 5.2868e-08 au
i 21.45462084038874 5.3874e-07 deg
node 350.28486100 3.6161e-06 deg
peri 84.40481450025996 1.8182e-05 deg
M 177.0332880981464 1.9504e-05 deg
tp 2458355.016219481032
(2018-Aug-24.51621948)
0.00011478 TDB
period 2117.873790939062
5.80
2.0745e-05
5.68e-08
d
yr
n .1699818003982081 1.665e-09 deg/d
Q 3.423216517472873 2.2354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1947  
   data-arc span      14163 days (38.78 yr)  
   first obs. used      1982-09-18  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39636  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:24:27  

Additional Information
 Earth MOID = 2.12706 au 
 Jupiter MOID = 1.76398 au 
 T_jup = 3.075 
[ 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 12.48   n/a MPCxxxxx  
diameter diameter 17.496 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20617 (1999 SA7)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SA7 = 1982 SO7 = 1997 BR9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-04 04:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin