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 ]  
11612 Obu (1995 YZ1)
Classification: Main-belt Asteroid          SPK-ID: 2011612
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1753723657334141 3.2404e-08  
a 2.899538625790196 1.4891e-08 au
q 2.391039677449957 9.894e-08 au
i 7.181444525266919 5.7366e-06 deg
node 11.19622956855133 3.0115e-05 deg
peri 60.16419652730555 3.439e-05 deg
M 273.2107132758521 1.6256e-05 deg
tp 2459035.265819205017
(2020-Jul-04.76581920)
8.2099e-05 TDB
period 1803.39879288647
4.94
1.3892e-05
3.803e-08
d
yr
n .1996230680756939 1.5378e-09 deg/d
Q 3.408037574130435 1.7502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      10106 days (27.67 yr)  
   first obs. used      1992-03-25  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50118  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:37:41  

Additional Information
 Earth MOID = 1.41475 au 
 Jupiter MOID = 1.95228 au 
 T_jup = 3.253 
[ 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 13.6   n/a MPO365389  
diameter diameter 6.451 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.169   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

11612 Obu           Discovered 1995 Dec. 21 by A. Nakamura at Kuma Kogen.
Obu City (population 76~000), where the discoverer lived for six and a half years, is located in the center of Aichi Prefecture. Known for its automobile industry, Obu is also famous for the 500-year-old "Doburoku Festival", held at Nagakusa-Tenjinsha Shrine.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ 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 2019-Dec-12 06:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin