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9178 Momoyo (1991 DU)
Classification: Main-belt Asteroid          SPK-ID: 2009178
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08126534920521986 3.9076e-08  
a 2.878874217529367 1.3826e-08 au
q 2.644921498923939 1.1045e-07 au
i 2.261187139530044 4.277e-06 deg
node 31.33787950034287 9.9873e-05 deg
peri 17.381709116145 0.00010428 deg
M 94.60892153495486 2.8534e-05 deg
tp 2458531.619627442405
(2019-Feb-17.11962744)
0.00014162 TDB
period 1784.15451082348
4.88
1.2853e-05
3.519e-08
d
yr
n .2017762462926159 1.4536e-09 deg/d
Q 3.112826936134795 1.495e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1891  
   data-arc span      11133 days (30.48 yr)  
   first obs. used      1989-11-04  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49924  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:08:14  

Additional Information
 Earth MOID = 1.65496 au 
 Jupiter MOID = 2.18536 au 
 T_jup = 3.289 
[ 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 13.8   n/a MPO384838  
diameter diameter 5.633 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.202   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9178 Momoyo           Discovered 1991 Feb. 23 by S. Inoda and T. Urata at Karasuyama.
Momoyo Urata is the wife of the second discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

Alternate Designations
 1991 DU = 1994 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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