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2090 Mizuho (1978 EA)
Classification: Main-belt Asteroid          SPK-ID: 2002090
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338006021022989 4.5691e-08  
a 3.074258634264518 1.7173e-08 au
q 2.662920977981734 1.3745e-07 au
i 11.81272128008851 4.8982e-06 deg
node 339.8186130385262 2.0195e-05 deg
peri 341.392885839165 2.7208e-05 deg
M 160.1559686913562 2.0887e-05 deg
tp 2458124.609820862776
(2018-Jan-06.10982086)
0.00011195 TDB
period 1968.833675484609
5.39
1.6498e-05
4.517e-08
d
yr
n .1828493714236118 1.5322e-09 deg/d
Q 3.485596290547301 1.9471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2675  
   data-arc span      25451 days (69.68 yr)  
   first obs. used      1951-03-13  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40687  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:04:19  

Additional Information
 Earth MOID = 1.65381 au 
 Jupiter MOID = 1.87867 au 
 T_jup = 3.184 
[ 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 10.8   n/a MPO502173  
diameter diameter 17.991 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.47 h n/a LCDB (Rev. 2020-October); 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:
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 146-147.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.219   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.871   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.78 deg.
U-B UB 0.499   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.78 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

2090 Mizuho (1978 EA)          Discovered 1978-Mar-12 by Urata, T. at Yakiimo Station
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1978 EA = 1937 RE = 1942 PG = 1951 EH = 1952 HA4 = 1953 RT = 1953 TP = 1959 VD = 1964 TE = 1970 WV = 1978 EJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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