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

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

JPL Small-Body Database Browser
Search: [ help ]  
8373 Stephengould (1992 AB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008373
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5545033361062833 4.7692e-08  
a 3.281167144979414 9.9124e-09 au
q 1.461749016766 1.5402e-07 au
i 40.78297376182063 8.0758e-06 deg
node 88.86046084947246 8.6233e-06 deg
peri 55.40727983605732 1.7847e-05 deg
M 329.5492650708651 6.1145e-06 deg
tp 2459580.126871982406
3.7489e-05 TDB
period 2170.905696283115
n .1658294050342071 7.5146e-10 deg/d
Q 5.100585273192827 1.5409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1210  
   data-arc span      10456 days (28.63 yr)  
   first obs. used      1992-01-01  
   last obs. used      2020-08-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39882  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:33:29  

Additional Information
 Earth MOID = .64545 au 
 Jupiter MOID = 1.46449 au 
 T_jup = 2.587 
[ 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 14.1   n/a MPO384830  
diameter diameter 5.748 km 1.346 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 4.435 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 67-70.]
[Behrend, R. (2010) Observatoire de Geneve web site,]
[Krugly, Yu.N.: Behrend, R.; Pravec, P.; Hornoch, K.; et al. (2010) CBET 2193.]
geometric albedo albedo 0.133   0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8373 Stephengould           Discovered 1992 Jan. 1 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Stephen Jay Gould (b. 1941) is a biologist, geologist and historian of science at Harvard, but he may be best known for his long-running series of reflective articles in Natural History in which he has articulated his view of evolution. In 1972, working with Niles Eldredge, he developed his idea of "punctuated equilibrium".
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19991123/MPCPages.arcLast Updated: 2010-06-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-Sep-22 02:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin