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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1925531541274831 3.2218e-08  
a 2.3720833408561 8.9512e-09 au
q 1.915331211721 7.6565e-08 au
i 2.199157015204122 4.4086e-06 deg
node 171.9653201076654 9.6872e-05 deg
peri 245.2907720603186 9.7655e-05 deg
M 307.7444237886978 1.4602e-05 deg
tp 2459590.197262216115
(2022-Jan-10.69726222)
5.4774e-05 TDB
period 1334.422456961055
3.65
7.5533e-06
2.068e-08
d
yr
n .2697796324709983 1.527e-09 deg/d
Q 2.8288354699912 1.0675e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      10458 days (28.63 yr)  
   first obs. used      1992-12-21  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52449  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 20:41:12  

Additional Information
 Earth MOID = .928154 au 
 Jupiter MOID = 2.51851 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456968.5 (2014-Nov-07.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1932366505936552 3.2247e-08  
q 1.912942763921424 7.6641e-08 au
tp 2456923.536251156382
(2014-Sep-23.03625116)
4.743e-05 TDB
node 172.0851768957383 9.7155e-05 deg
peri 245.4646549334462 9.7926e-05 deg
i 2.195334190457413 4.405e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      10458 days (28.63 yr)  
   first obs. used      1992-12-21  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52449  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 20:41:12  

Additional Information
 Jupiter MOID = 2.51851 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.039871657369627E-15 -2.461179255712046E-15 -1.575362349546832E-13 -6.866033610469041E-16 -3.114414147917099E-14 2.370306649590856E-16
q -2.461179255712046E-15 5.873913067475071E-15 4.882724342427471E-13 1.133999241835952E-15 1.022368187950308E-13 -5.404424948222505E-16
tp -1.575362349546832E-13 4.882724342427471E-13 2.249643026426805E-9 -5.035049455251313E-12 5.936161452440928E-10 9.247753530518123E-15
node -6.866033610469041E-16 1.133999241835952E-15 -5.035049455251313E-12 9.439087565999389E-9 -9.433019318299035E-9 -5.047787332779885E-11
peri -3.114414147917099E-14 1.022368187950308E-13 5.936161452440928E-10 -9.433019318299035E-9 9.589587217867334E-9 5.043517418513031E-11
i 2.370306649590856E-16 -5.404424948222505E-16 9.247753530518123E-15 -5.047787332779885E-11 5.043517418513031E-11 1.940374932893668E-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 15.28   n/a E2021B10  
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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