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13221 Nao (1997 OY)
Classification: Main-belt Asteroid          SPK-ID: 2013221
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1441619169311009 6.7479e-08  
a 2.734653809125926 2.4127e-08 AU
q 2.340420873859396 1.8407e-07 AU
i 8.206007008139128 7.3048e-06 deg
node 318.6453360394815 4.3387e-05 deg
peri 148.4692403067809 4.843e-05 deg
M 148.5250432949028 2.2057e-05 deg
tp 2456319.026227047373
(2013-Jan-26.52622705)
9.8957e-05 JED
period 1651.779072542206
4.52
2.186e-05
5.985e-08
d
yr
n .2179468222986591 2.8843e-09 deg/d
Q 3.128886744392457 2.7605e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      10764 days (29.47 yr)  
   first obs. used      1986-01-07  
   last obs. used      2015-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52324  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:11:32  

Additional Information
 Earth MOID = 1.36139 AU 
 T_jup = 3.323 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a MPO263467  

13221 Nao           Discovered 1997 July 24 by A. Nakamura at Kuma Kogen.
Naomi Nakamura (b. 1965), whose nickname is Nao, is the wife of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1997 OY = 1986 AP 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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