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 ]  
9147 Kourakuen (1977 DD1)
Classification: Main-belt Asteroid          SPK-ID: 2009147
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1063148143120122 2.9447e-08  
a 2.191162655190768 5.8805e-09 au
q 1.958209604376746 6.3912e-08 au
i 5.815398079496947 5.2139e-06 deg
node 142.3085320003764 2.6118e-05 deg
peri 252.749502867416 3.5877e-05 deg
M 102.4542691584677 2.4422e-05 deg
tp 2458263.338550702702
(2018-May-24.83855070)
8.0141e-05 TDB
period 1184.705359220216
3.24
4.7691e-06
1.306e-08
d
yr
n .303873023953361 1.2233e-09 deg/d
Q 2.42411570600479 6.5057e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2015  
   data-arc span      24928 days (68.25 yr)  
   first obs. used      1951-02-10  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47363  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:40:04  

Additional Information
 Earth MOID = .972683 au 
 Jupiter MOID = 2.93317 au 
 T_jup = 3.659 
[ 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 13.5   n/a MPO431605  
diameter diameter 4.922 km 0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.241   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9147 Kourakuen           Discovered 1977 Feb. 18 by H. Kosai and K. Hurukawa at the Kiso Station of the Tokyo Astronomical Observatory.
Kourakuen in Okayama is one of the three most outstanding gardens in Japan. Its construction was begun in 1686.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1977 DD1 = 1951 CJ = 1969 VT2 = 1982 US9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-12 19:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin