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22489 Yanaka (1997 GR24)
Classification: Main-belt Asteroid          SPK-ID: 2022489
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1918806407099695 1.5461e-08  
a 2.690844960465276 8.6242e-09 au
q 2.174523905400007 4.0281e-08 au
i 12.17280107634607 3.5552e-07 deg
node 195.0159808236187 1.3402e-06 deg
peri 125.9177705779488 5.1533e-06 deg
M 52.72290517327363 4.5628e-06 deg
tp 2458964.382447703863
(2020-Apr-24.88244770)
1.9986e-05 TDB
period 1612.246490348917
4.41
7.7509e-06
2.122e-08
d
yr
n .2232909186994664 1.0735e-09 deg/d
Q 3.207166015530547 1.0279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2203  
   data-arc span      8767 days (24.00 yr)  
   first obs. used      1997-03-05  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44161  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:06:55  

Additional Information
 Earth MOID = 1.18645 au 
 Jupiter MOID = 2.27855 au 
 T_jup = 3.314 
[ 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 13.65   n/a E2021B10  
diameter diameter 5.679 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.165   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22489 Yanaka           Discovered 1997 Apr. 7 by A. Nakamura at Kuma Kogen.
Tetsuo Yanaka (b. 1954) is a post office clerk and amateur astronomer in Japan. He started his visual search for comets in 1970, and after sweeping for 1068 hours, he independently discovered C/1988 P1. Five months later, he discovered two more comets, C/1988 Y1 and C/1989 A1, only three days apart.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

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