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18461 Seiichikanno (1995 QQ)
Classification: Main-belt Asteroid          SPK-ID: 2018461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1118103647808478 3.9913e-08  
a 2.650696696048399 1.3916e-08 au
q 2.354321331539839 1.0786e-07 au
i 13.75248249760862 4.8078e-06 deg
node 314.1535812553899 1.6398e-05 deg
peri 333.3815964088771 2.8228e-05 deg
M 355.255643323062 2.5683e-05 deg
tp 2459221.273674036211
(2021-Jan-06.77367404)
0.00011248 TDB
period 1576.298571603725
4.32
1.2413e-05
3.398e-08
d
yr
n .2283831289866211 1.7985e-09 deg/d
Q 2.947072060556959 1.5472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1440  
   data-arc span      9641 days (26.40 yr)  
   first obs. used      1994-03-23  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47115  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:38  

Additional Information
 Earth MOID = 1.34383 au 
 Jupiter MOID = 2.29916 au 
 T_jup = 3.341 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.91   n/a E2021B10  
diameter diameter 6.523 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.151   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18461 Seiichikanno           Discovered 1995 Aug. 17 by T. Okuni at Nanyo.
Seiichi Kanno (b. 1954) is an education consultant and an amateur astronomer, who has observed the planets since 1970. He built an observatory in Kaminoyama city, Yamagata, in 1989, and now observes the planets with a video camera.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

Alternate Designations
 1995 QQ = 1998 FX13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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