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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08141699899358307 3.8273e-08  
a 2.878277599738178 1.3261e-08 au
q 2.643936875297042 1.0871e-07 au
i 2.261404098963141 4.2609e-06 deg
node 31.33316864611589 9.4524e-05 deg
peri 17.26740598227421 9.8304e-05 deg
M 135.0835776875361 2.6243e-05 deg
tp 2458531.235949990974
(2019-Feb-16.73594999)
0.00012974 TDB
period 1783.599917382704
4.88
1.2326e-05
3.375e-08
d
yr
n .2018389866984701 1.3949e-09 deg/d
Q 3.112618324179314 1.434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1967  
   data-arc span      11461 days (31.38 yr)  
   first obs. used      1989-11-04  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49636  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:12:56  

Additional Information
 Earth MOID = 1.65304 au 
 Jupiter MOID = 2.18623 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 13.83   n/a E2021B10  
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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