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 ]  
15868 Akiyoshidai (1996 OL)
Classification: Main-belt Asteroid          SPK-ID: 2015868
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652222425350693 4.112e-08  
a 2.254013755146296 8.7599e-09 au
q 1.881600547816132 9.4212e-08 au
i 4.532127168915121 3.9456e-06 deg
node 96.73627997454447 5.6509e-05 deg
peri 230.5436261183835 5.7793e-05 deg
M 257.7510221012653 1.5368e-05 deg
tp 2458951.566786953184
(2020-Apr-12.06678695)
5.4017e-05 TDB
period 1236.042118957065
3.38
7.2056e-06
1.973e-08
d
yr
n .2912522109713844 1.6979e-09 deg/d
Q 2.626426962476459 1.0207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1323  
   data-arc span      8811 days (24.12 yr)  
   first obs. used      1995-03-27  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5419  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:22:07  

Additional Information
 Earth MOID = .87283 au 
 Jupiter MOID = 2.69398 au 
 T_jup = 3.603 
[ 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 14.9   n/a MPO324455  
diameter diameter 5.635 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.067   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

15868 Akiyoshidai           Discovered 1996 July 16 by A. Nakamura at Kuma Kogen.
Akiyoshidai, located at the center of Yamaguchi prefecture, is the biggest karst plateau in Japan, with an area of 130 square kilometers. Beneath the plateau, 380 caverns have been discovered, including Akiyoshido Cavern, the largest cavern in Japan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 23:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin