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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1758979350105802 2.5885e-08  
a 2.900860027856168 1.2088e-08 au
q 2.390604739201534 7.6429e-08 au
i 7.181063093940774 4.4285e-06 deg
node 11.18351403583864 2.8402e-05 deg
peri 60.09576951424162 3.2529e-05 deg
M 72.12059491266288 1.4249e-05 deg
tp 2459034.969129200946
(2020-Jul-04.46912920)
7.1572e-05 TDB
period 1804.63172336932
4.94
1.128e-05
3.088e-08
d
yr
n .1994866849219882 1.2469e-09 deg/d
Q 3.411115316510803 1.4214e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1981  
   data-arc span      10667 days (29.20 yr)  
   first obs. used      1992-03-25  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46809  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:44:57  

Additional Information
 Earth MOID = 1.41428 au 
 Jupiter MOID = 1.95083 au 
 T_jup = 3.252 
[ 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 13.63   n/a MPCxxxxx  
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 ]
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