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4574 Yoshinaka (1986 YB)
Classification: Main-belt Asteroid          SPK-ID: 2004574
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1005671436833021 4.0484e-08  
a 2.997603862961884 1.6102e-08 au
q 2.696143404569775 1.1998e-07 au
i 8.710578355284397 3.7483e-06 deg
node 280.06523955 2.9077e-05 deg
peri 103.7770145294872 3.4468e-05 deg
M 191.1819262157839 1.9762e-05 deg
tp 2459889.447732301607
(2022-Nov-05.94773230)
0.00010679 TDB
period 1895.657120443341
5.19
1.5274e-05
4.182e-08
d
yr
n .1899077613338672 1.5302e-09 deg/d
Q 3.299064321353994 1.7721e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2013  
   data-arc span      23563 days (64.51 yr)  
   first obs. used      1955-10-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:09:44  

Additional Information
 Earth MOID = 1.71712 au 
 Jupiter MOID = 2.15877 au 
 T_jup = 3.229 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456920.5 (2014-Sep-20.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1002641372285778 4.0464e-08  
q 2.697453867921455 1.1987e-07 au
tp 2456101.644303792711
(2012-Jun-23.14430379)
9.8805e-05 TDB
node 280.08133123238 2.9074e-05 deg
peri 104.6575498784271 3.4497e-05 deg
i 8.710413466229729 3.7483e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2013  
   data-arc span      23563 days (64.51 yr)  
   first obs. used      1955-10-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:09:44  

Additional Information
 Jupiter MOID = 2.15877 au 
 T_jup = 3.229 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.637357800686859E-15 -4.816070743925708E-15 5.899311888277948E-14 -2.660922301117987E-15 -6.737795798679808E-15 1.488496479836875E-16
q -4.816070743925708E-15 1.436984286934469E-14 -1.40581888708601E-14 6.815363323895335E-15 6.741573231753161E-14 -2.217177732704834E-16
tp 5.899311888277948E-14 -1.40581888708601E-14 9.762399172109102E-9 5.017333239739465E-12 1.859771765860096E-9 -1.467910881710834E-12
node -2.660922301117987E-15 6.815363323895335E-15 5.017333239739465E-12 8.453087750066739E-10 -8.344584654675297E-10 -5.928701389801346E-12
peri -6.737795798679808E-15 6.741573231753161E-14 1.859771765860096E-9 -8.344584654675297E-10 1.19003727616466E-9 5.607438606452179E-12
i 1.488496479836875E-16 -2.217177732704834E-16 -1.467910881710834E-12 -5.928701389801346E-12 5.607438606452179E-12 1.404989749593898E-11

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 12.3   n/a MPO384794  
diameter diameter 12.071 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.02736 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.143   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4574 Yoshinaka (1986 YB)          Discovered 1986-Dec-20 by Niijima and Urata at Ojima
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1986 YB = 1977 BR = 1981 YT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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