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39809 Fukuchan (1997 WB30)
Classification: Main-belt Asteroid          SPK-ID: 2039809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2198901851062999 3.4996e-08  
a 2.229395528539394 6.9982e-09 au
q 1.739173333093709 7.996e-08 au
i 5.409333701013555 3.3068e-06 deg
node 85.3690580972154 4.0538e-05 deg
peri 278.6452439414935 4.177e-05 deg
M 71.55288892490357 7.9941e-06 deg
tp 2459154.840547256270
(2020-Nov-01.34054726)
2.7074e-05 TDB
period 1215.847526143193
3.33
5.7249e-06
1.567e-08
d
yr
n .2960897581804202 1.3942e-09 deg/d
Q 2.719617723985079 8.537e-09 au
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      9065 days (24.82 yr)  
   first obs. used      1996-04-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5315  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 20:44:50  

Additional Information
 Earth MOID = .74656 au 
 Jupiter MOID = 2.7534 au 
 T_jup = 3.605 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457747.5 (2016-Dec-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204835452426744 3.488e-08  
q 1.737425834504738 7.9747e-08 au
tp 2457939.818880218965
(2017-Jul-05.31888022)
2.8071e-05 TDB
node 85.3758660564836 4.0532e-05 deg
peri 278.8202193260161 4.176e-05 deg
i 5.410462584239689 3.3068e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      9065 days (24.82 yr)  
   first obs. used      1996-04-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5315  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 20:44:50  

Additional Information
 Jupiter MOID = 2.7534 au 
 T_jup = 3.605 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.216612664339238E-15 -2.775671340855716E-15 -2.259686719965166E-13 1.496143331140214E-14 -1.024839970494042E-13 -4.615536312831178E-15
q -2.775671340855716E-15 6.359568563617066E-15 4.580561671539068E-13 -3.285506994552141E-14 2.124082473799984E-13 1.06446367330169E-14
tp -2.259686719965166E-13 4.580561671539068E-13 7.879649739759293E-10 -1.056735392524349E-11 2.936776141479363E-10 2.154134105238007E-12
node 1.496143331140214E-14 -3.285506994552141E-14 -1.056735392524349E-11 1.642874350219449E-9 -1.639264124543986E-9 2.550120866434198E-11
peri -1.024839970494042E-13 2.124082473799984E-13 2.936776141479363E-10 -1.639264124543986E-9 1.74393184494352E-9 -2.46183789779449E-11
i -4.615536312831178E-15 1.06446367330169E-14 2.154134105238007E-12 2.550120866434198E-11 -2.46183789779449E-11 1.093486308789E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.29   n/a E2021B10  
diameter diameter 1.527 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.331   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39809 Fukuchan           Discovered 1997 Nov. 30 by T. Seki at Geisei.
Fukuchan is the name of a boy character and the title of the cartoons created by Ryuichi Yokoyama (1909-2001), who was born in Kochi City. Yokoyama was a famous and respected cartoonist in Japan. Fukuchan was serialized in the Mainichi newspaper, appearing 5534 times from 1956 to 1971.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040504/MPCPages.arcLast Updated: 2004-05-11

Alternate Designations
 1997 WB30 = 2000 PJ19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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