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 ]  
8274 Soejima (1990 TJ1)
Classification: Main-belt Asteroid          SPK-ID: 2008274
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2016598118404468 3.7875e-08  
a 2.273781708998202 7.6547e-09 au
q 1.815251317395375 8.6175e-08 au
i 3.729196660513268 3.3512e-06 deg
node 76.70430882284165 6.0889e-05 deg
peri 314.6492221501318 6.1362e-05 deg
M 228.6830069394147 8.6531e-06 deg
tp 2459457.314634495004
(2021-Aug-30.81463449)
3.1275e-05 TDB
period 1252.338060637194
3.43
6.324e-06
1.731e-08
d
yr
n .2874623165384199 1.4516e-09 deg/d
Q 2.732312100601029 9.1983e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1871  
   data-arc span      28299 days (77.48 yr)  
   first obs. used      1942-11-05  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50394  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:56:01  

Additional Information
 Earth MOID = .823496 au 
 Jupiter MOID = 2.70577 au 
 T_jup = 3.581 
[ 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 14.3   n/a MPO319189  
diameter diameter 3.391 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.268   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

8274 Soejima           Discovered 1990 Oct. 15 by K. Endate and K. Watanabe at Kitami.
Named in honor of Tsutomu Soejima (b. 1950), a Japanese amateur astronomer and secretary of the Saga Astronomical Society since 1989. He is a board member of the astronomical society's observatory, the Tara Observatory and the Saga City Observatory. His main interests are comet hunting and photography. Name proposed by the discoverers following a suggestion by Y. Yamada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1990 TJ1 = 1942 VC = 1973 YS1 = 1997 XJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-29 16:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin