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4577 Chikako (1988 WG)
Classification: Main-belt Asteroid          SPK-ID: 2004577
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2899018606153745 1.6103e-08  
a 2.625876491683599 7.6327e-09 au
q 1.864630010998352 4.1475e-08 au
i 9.368853815110077 6.7233e-07 deg
node 58.03144305565907 2.8101e-06 deg
peri 64.64425452322507 4.3842e-06 deg
M 165.3321916355153 3.2139e-06 deg
tp 2458486.719315170985
(2019-Jan-03.21931517)
1.1595e-05 TDB
period 1554.21061074985
4.26
6.7765e-06
1.855e-08
d
yr
n .2316288394314289 1.0099e-09 deg/d
Q 3.387122972368847 9.8455e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1926  
   data-arc span      26839 days (73.48 yr)  
   first obs. used      1947-04-13  
   last obs. used      2020-10-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4216  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:31:25  

Additional Information
 Earth MOID = .902426 au 
 Jupiter MOID = 1.80628 au 
 T_jup = 3.323 
[ 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 12.51   n/a E2021B10  
diameter diameter 11.270 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.83 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Cooney, W.R.; Gross, J. (2003) Minor Planet Bull. 30, 3.]
geometric albedo albedo 0.224   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4577 Chikako (1988 WG)          Discovered 1988-Nov-30 by Kushida and Inoue at Yatsugatake
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1988 WG = 1947 GF = 1951 CJ1 = 1951 DK = 1975 XE7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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