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 ]  
21586 Pourkaviani (1998 SU129)
Classification: Main-belt Asteroid          SPK-ID: 2021586
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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404842285810296 1.8262e-08  
a 3.093227752834369 1.1925e-08 au
q 2.658678038152001 5.609e-08 au
i 1.804564574036348 2.4513e-07 deg
node 125.4634487836867 8.1425e-06 deg
peri 143.3027424503494 8.9713e-06 deg
M 161.5851340617625 7.594e-06 deg
tp 2458504.602028657491
3.9361e-05 TDB
period 1987.084217540557
n .1811699759990934 1.0477e-09 deg/d
Q 3.527777467516736 1.3601e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3128  
   data-arc span      13160 days (36.03 yr)  
   first obs. used      1985-03-22  
   last obs. used      2021-04-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46554  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:34:45  

Additional Information
 Earth MOID = 1.64281 au 
 Jupiter MOID = 1.56224 au 
 T_jup = 3.208 
[ 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 12.65   n/a E2021B10  
diameter diameter 17.113 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 27.0489 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.060   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

21586 Pourkaviani           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Shahin Pourkaviani (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his behavioral and social sciences team project. He attends the Lake Brantley High School, Altamonte Springs, Florida, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 SU129 = 1985 FO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2021-Sep-21 15:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin