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16718 Morikawa (1995 UA9)
Classification: Main-belt Asteroid          SPK-ID: 2016718
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09198726795842103 4.1581e-08  
a 3.063594203769101 1.6992e-08 au
q 2.781782542831127 1.3451e-07 au
i 4.369378964754484 4.7512e-06 deg
node 11.76678056935239 4.6867e-05 deg
peri 323.4103389256772 5.2846e-05 deg
M 297.1203099904948 2.6497e-05 deg
tp 2459542.600080895646
(2021-Nov-24.10008090)
0.00014536 TDB
period 1958.597905043994
5.36
1.6295e-05
4.461e-08
d
yr
n .1838049551022641 1.5292e-09 deg/d
Q 3.345405864707075 1.8555e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1881  
   data-arc span      13113 days (35.90 yr)  
   first obs. used      1984-09-27  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51383  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:39:55  

Additional Information
 Earth MOID = 1.77184 au 
 Jupiter MOID = 1.99797 au 
 T_jup = 3.222 
[ 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 13.28   n/a E2021B10  
diameter diameter 13.215 km 0.465 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16718 Morikawa           Discovered 1995 Oct. 30 by K. Endate and K. Watanabe at Kitami.
Yoshiki Morikawa (b. 1981) is a Japanese amateur astronomer and popularizer of astronomy in Tokyo. He enjoys observing and photographing nebulae and star clusters through his telescope.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-07-22Last Updated: 2014-08-13

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Alternate Designations
 1995 UA9 = 1984 SX3 = 1998 FF50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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