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15202 Yamada-Houkoku (1977 EM5)
Classification: Main-belt Asteroid          SPK-ID: 2015202
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2093997152266332 4.4917e-08  
a 2.392034576065418 8.0534e-09 au
q 1.891143217025059 1.0586e-07 au
i 9.573664421927869 4.6515e-06 deg
node 177.6677237952346 2.582e-05 deg
peri 224.3431247690934 2.7305e-05 deg
M 356.8042169484035 9.7655e-06 deg
tp 2459012.495666820132
(2020-Jun-11.99566682)
3.6681e-05 TDB
period 1351.293246608284
3.70
6.8242e-06
1.868e-08
d
yr
n .2664114550291671 1.3454e-09 deg/d
Q 2.892925935105777 9.7397e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      15623 days (42.77 yr)  
   first obs. used      1977-03-12  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:13:10  

Additional Information
 Earth MOID = .911114 au 
 Jupiter MOID = 2.56011 au 
 T_jup = 3.483 
[ 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 14.3   n/a MPO492921  
diameter diameter 8.093 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 26.299 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Oey, J.; Groom, R. (2019) Minor Planet Bull. 46, 119-125.]
geometric albedo albedo 0.056   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15202 Yamada-Houkoku           Discovered 1977 Mar. 12 by H. Kosai and K. Hurukawa at the Kiso Station of the Tokyo Astronomical Observatory.
Yamada-Houkoku (1805-1877) was a Confucian and Japanese scholar of the late Edo period, born in Okayama prefecture.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ show close-approach data ]
Alternate Designations
 1977 EM5 = 1986 RK3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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