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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21793 (1999 SG8)
Classification: Main-belt Asteroid          SPK-ID: 2021793
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1478196997139656 4.5825e-08  
a 3.051762555359261 1.874e-08 au
q 2.600651930827731 1.483e-07 au
i 10.02258551363822 4.0068e-06 deg
node 103.9665481509114 2.2163e-05 deg
peri 272.4468676856612 2.5894e-05 deg
M 9.250126691855764 1.4459e-05 deg
tp 2459346.465482387092
(2021-May-11.96548239)
7.801e-05 TDB
period 1947.262663602841
5.33
1.7937e-05
4.911e-08
d
yr
n .1848749050289523 1.7029e-09 deg/d
Q 3.502873179890792 2.1511e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1277  
   data-arc span      9340 days (25.57 yr)  
   first obs. used      1996-01-12  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5183  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:47  

Additional Information
 Earth MOID = 1.62588 au 
 Jupiter MOID = 2.06691 au 
 T_jup = 3.197 
[ 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 13.91   n/a E2021B10  
diameter diameter 10.942 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21793 (1999 SG8)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SG8 = 2000 WS60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-20 11:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin