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11925 Usubae (1992 YA1)
Classification: Main-belt Asteroid          SPK-ID: 2011925
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936750166253574 3.2372e-08  
a 2.371432929891423 8.8241e-09 au
q 1.912145617768781 7.6989e-08 au
i 2.19705456388696 4.4087e-06 deg
node 172.0525204934844 9.7783e-05 deg
peri 245.2269286951278 9.8565e-05 deg
M 200.9824993220166 1.4464e-05 deg
tp 2459589.692376178227
(2022-Jan-10.19237618)
5.5561e-05 TDB
period 1333.873658684217
3.65
7.445e-06
2.038e-08
d
yr
n .2698906284386166 1.5064e-09 deg/d
Q 2.830720242014064 1.0533e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1130  
   data-arc span      10100 days (27.65 yr)  
   first obs. used      1992-12-21  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52182  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:22  

Additional Information
 Earth MOID = .925387 au 
 Jupiter MOID = 2.51537 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456939.5 (2014-Oct-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1932192094131651 3.2394e-08  
q 1.912939256430508 7.6948e-08 au
tp 2456923.527410238146
(2014-Sep-23.02741024)
4.8148e-05 TDB
node 172.0855821389581 9.7871e-05 deg
peri 245.4607358141986 9.8655e-05 deg
i 2.195337655959374 4.4084e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1130  
   data-arc span      10100 days (27.65 yr)  
   first obs. used      1992-12-21  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52182  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:22  

Additional Information
 Jupiter MOID = 2.51537 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.049343559912084E-15 -2.481920597723777E-15 -1.451234253910179E-13 -4.541813978025054E-16 -2.819637356538036E-14 2.350699867051328E-16
q -2.481920597723777E-15 5.92102376253652E-15 4.710420708147945E-13 5.911548646823459E-16 9.801317368350686E-14 -5.313180552735711E-16
tp -1.451234253910179E-13 4.710420708147945E-13 2.318229765755424E-9 -5.176672564254258E-12 6.094304241142718E-10 2.566994672719823E-14
node -4.541813978025054E-16 5.911548646823459E-16 -5.176672564254258E-12 9.578829277040862E-9 -9.572705098586316E-9 -5.04161953278905E-11
peri -2.819637356538036E-14 9.801317368350686E-14 6.094304241142718E-10 -9.572705098586316E-9 9.732817938190573E-9 5.037759141566889E-11
i 2.350699867051328E-16 -5.313180552735711E-16 2.566994672719823E-14 -5.04161953278905E-11 5.037759141566889E-11 1.943361496295379E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.3   n/a MPO473928  
diameter diameter 2.062 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.379   0.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11925 Usubae           Discovered 1992 Dec. 23 by T. Seki at Geisei.
Usubae at Cape Ashizuri in western Kochi prefecture is a beautiful beach featuring many strange rock formations. It is a famous spot for fishing and well-known as the first place in the Japanese archipelago that the Kuroshio ocean current reaches.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-11-14Last Updated: 2016-11-20

Alternate Designations
 1992 YA1 = 1997 BQ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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