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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
39603 (1993 TU20)
Classification: Main-belt Asteroid          SPK-ID: 2039603
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1565995714592842 7.0967e-08  
a 2.311262183325586 9.8482e-09 au
q 1.94931951588675 1.6586e-07 au
i 9.142239891593503 5.7625e-06 deg
node 27.90545312539856 2.8209e-05 deg
peri 142.5734503394405 3.1428e-05 deg
M 316.8900386523669 1.2364e-05 deg
tp 2458754.190626082224
(2019-Sep-27.69062608)
4.4312e-05 TDB
period 1283.430178548247
3.51
8.2029e-06
2.246e-08
d
yr
n .2804983130498103 1.7928e-09 deg/d
Q 2.673204850764423 1.139e-08 au
  Orbit Determination Parameters
   # obs. used (total)      941  
   data-arc span      11285 days (30.90 yr)  
   first obs. used      1988-04-09  
   last obs. used      2019-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53549  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:07:36  

Additional Information
 Earth MOID = .962588 au 
 Jupiter MOID = 2.30272 au 
 T_jup = 3.551 
[ 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 15.2   n/a MPO385068  
diameter diameter 2.958 km 0.491 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.221   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39603 (1993 TU20)          Discovered 1993-Oct-09 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 TU20 = 1988 GX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-19 16:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin