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
JPL Small-Body Database Browser
Search: [ help ]  
30745 (1981 EB22)
Classification: Main-belt Asteroid          SPK-ID: 2030745
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1190557931846786 4.0554e-08  
a 3.139618138956816 1.9283e-08 au
q 2.765828411126308 1.2276e-07 au
i 2.196968374465994 3.3704e-06 deg
node 111.2946084553852 0.00014009 deg
peri 40.14146358776826 0.00014139 deg
M 77.96348887232719 1.8835e-05 deg
tp 2458760.449583896297
(2019-Oct-03.94958390)
0.0001058 TDB
period 2031.953060191524
5.56
1.872e-05
5.125e-08
d
yr
n .1771694469979871 1.6322e-09 deg/d
Q 3.513407866787324 2.1579e-08 au
  Orbit Determination Parameters
   # obs. used (total)      907  
   data-arc span      14374 days (39.35 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:38  

Additional Information
 Earth MOID = 1.77694 au 
 Jupiter MOID = 1.48056 au 
 T_jup = 3.199 
[ 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 14.47   n/a E2021B10  
diameter diameter 6.126 km 1.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.090   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30745 (1981 EB22)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EB22 = 1998 HW81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-13 09:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin