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 ]  
8618 Sethjacobson (1981 DX)
Classification: Main-belt Asteroid          SPK-ID: 2008618
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02162681718577592 1.859e-08  
a 3.199208299448828 1.5783e-08 au
q 3.130019606417431 6.2031e-08 au
i 7.081395359659367 7.1696e-07 deg
node 265.5758212646279 1.3206e-05 deg
peri 147.0805581726311 5.1264e-05 deg
M 143.3603932340934 5.6667e-05 deg
tp 2458564.182767711985
(2019-Mar-21.68276771)
0.00032759 TDB
period 2090.076602499356
5.72
1.5467e-05
4.235e-08
d
yr
n .1722424908108653 1.2746e-09 deg/d
Q 3.268396992480224 1.6125e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2596  
   data-arc span      25349 days (69.40 yr)  
   first obs. used      1952-01-31  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44332  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 01:42:00  

Additional Information
 Earth MOID = 2.14411 au 
 Jupiter MOID = 1.89025 au 
 T_jup = 3.182 
[ 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 12.64   n/a MPCxxxxx  
diameter diameter 7.876 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8618 Sethjacobson           Discovered 1981 Feb. 28 by S. J. Bus at Siding Spring.
Seth A. Jacobson (b. 1986) is a postdoctoral researcher at the Observatoire de Nice whose research includes modeling binary asteroid formation and early solar system dynamical processes that may have shaped the structure of the current asteroid belt.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

[ show close-approach data ]
Alternate Designations
 1981 DX = 1972 TC6 = 1994 NG2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 23:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin