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 ]  
27688 (1981 EX23)
Classification: Main-belt Asteroid          SPK-ID: 2027688
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09380396570727498 3.4084e-08  
a 2.777799420714295 1.8409e-08 au
q 2.517230819111923 9.7365e-08 au
i 2.315878538976785 4.5003e-06 deg
node 253.9154590285666 0.00011581 deg
peri 36.2907095126044 0.00011938 deg
M 339.224668076669 2.8902e-05 deg
tp 2458698.087731307216
(2019-Aug-02.58773131)
0.00013591 TDB
period 1691.023922036339
4.63
1.681e-05
4.602e-08
d
yr
n .2128887683424882 2.1163e-09 deg/d
Q 3.038368022316666 2.0136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      831  
   data-arc span      14966 days (40.97 yr)  
   first obs. used      1977-05-18  
   last obs. used      2018-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54744  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 18:35:39  

Additional Information
 Earth MOID = 1.50075 au 
 Jupiter MOID = 2.09418 au 
 T_jup = 3.327 
[ 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 14.8   n/a MPO435956  
diameter diameter 2.781 km 0.436 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.301   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27688 (1981 EX23)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-14 09:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin