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 ]  
32756 (1981 ER15)
Classification: Main-belt Asteroid          SPK-ID: 2032756
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1042367182416256 3.5978e-08  
a 2.345290658091562 1.1045e-08 au
q 2.100825256569355 8.4246e-08 au
i 4.115354799155441 4.1176e-06 deg
node 257.781797160472 5.9132e-05 deg
peri 343.0380526668081 6.2849e-05 deg
M 171.8007219273333 2.1612e-05 deg
tp 2457974.440051672708
(2017-Aug-08.94005167)
7.8233e-05 TDB
period 1311.877964594088
3.59
9.2673e-06
2.537e-08
d
yr
n .2744157686278301 1.9385e-09 deg/d
Q 2.589756059613768 1.2196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      844  
   data-arc span      14584 days (39.93 yr)  
   first obs. used      1979-11-22  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57031  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:27:55  

Additional Information
 Earth MOID = 1.08831 au 
 Jupiter MOID = 2.4198 au 
 T_jup = 3.551 
[ 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 15.6   n/a MPO452630  
diameter diameter 1.933 km 0.343 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.359   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

32756 (1981 ER15)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020128/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin