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 ]  
4788 Simpson (1986 TL1)
Classification: Main-belt Asteroid          SPK-ID: 2004788
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .130213564090358 3.9124e-08  
a 2.262819116684915 8.931e-09 au
q 1.968169374609577 8.8012e-08 au
i 4.317903528104287 4.0165e-06 deg
node 277.1857462538934 5.7258e-05 deg
peri 110.1795405436391 5.9747e-05 deg
M 200.9090242559939 1.9428e-05 deg
tp 2459149.934884739876
(2020-Oct-27.43488474)
6.8926e-05 TDB
period 1243.292132575959
3.40
7.3606e-06
2.015e-08
d
yr
n .2895538309682063 1.7142e-09 deg/d
Q 2.557468858760254 1.0094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1540  
   data-arc span      15484 days (42.39 yr)  
   first obs. used      1976-12-16  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50054  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:41:34  

Additional Information
 Earth MOID = .977133 au 
 Jupiter MOID = 2.87506 au 
 T_jup = 3.603 
[ 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 13.7   n/a MPO324351  
diameter diameter 3.583 km 0.702 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.500   0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4788 Simpson (1986 TL1)          Discovered 1986-Oct-04 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1986 TL1 = 1976 YJ1 = 1979 RN1 = 1984 AS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-17 04:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin