Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
8454 (1981 EG1)
Classification: Main-belt Asteroid          SPK-ID: 2008454
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06730555983591226 4.8679e-08  
a 2.614895875989326 1.5768e-08 au
q 2.438898845143246 1.2699e-07 au
i 3.616221112034085 5.8856e-06 deg
node 21.78729246113394 7.6499e-05 deg
peri 229.6895650359313 8.8562e-05 deg
M 26.57226428949278 4.4508e-05 deg
tp 2457286.499674958793
(2015-Sep-20.99967496)
0.00019097 JED
period 1544.471956462617
4.23
1.397e-05
3.825e-08
d
yr
n .2330893730336978 2.1083e-09 deg/d
Q 2.790892906835405 1.6829e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1381  
   data-arc span      12584 days (34.45 yr)  
   first obs. used      1981-03-01  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48456  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:24:52  

Additional Information
 Earth MOID = 1.42551 au 
 Jupiter MOID = 2.22038 au 
 T_jup = 3.402 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a MPO253423  
rotation period rot_per 6.7273 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

8454 (1981 EG1)          Discovered 1981-Mar-05 by Debehogne, H., DeSanctis, G. at La Silla
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EG1 = 1981 EU1 = 1981 GC1 = 1987 UZ9 = 1989 CT1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-13 12:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin