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 ]  
35027 (1981 ET18)
Classification: Main-belt Asteroid          SPK-ID: 2035027
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1736287446545565 5.0207e-08  
a 2.614000238058611 1.1546e-08 au
q 2.160134658197783 1.2968e-07 au
i 4.041097820116328 7.3743e-06 deg
node 341.5202030259303 6.8359e-05 deg
peri 138.6721345479635 7.2147e-05 deg
M 43.18492851734464 2.1199e-05 deg
tp 2458415.323204059493
(2018-Oct-23.82320406)
9.0516e-05 TDB
period 1543.678519968095
4.23
1.0227e-05
2.8e-08
d
yr
n .2332091788175173 1.5451e-09 deg/d
Q 3.06786581791944 1.355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      732  
   data-arc span      14423 days (39.49 yr)  
   first obs. used      1979-10-18  
   last obs. used      2019-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56853  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:44:59  

Additional Information
 Earth MOID = 1.17829 au 
 Jupiter MOID = 2.01646 au 
 T_jup = 3.383 
[ 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 15.5   n/a MPO436009  
diameter diameter 1.994 km 0.447 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.307   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

35027 (1981 ET18)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 ET18 = 1998 FR53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-17 14:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin