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JPL Small-Body Database Browser
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42566 Ryutaro (1996 XQ25)
Classification: Main-belt Asteroid          SPK-ID: 2042566
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2407113010595218 4.1086e-08  
a 2.366545573253184 9.7444e-09 au
q 1.796891309298758 9.7813e-08 au
i 5.996940036201696 4.3056e-06 deg
node 127.8668127428951 4.2562e-05 deg
peri 268.7406283548094 4.3636e-05 deg
M 178.9783411068971 9.6552e-06 deg
tp 2458339.397631851944
(2018-Aug-08.89763185)
3.3965e-05 TDB
period 1329.752254163277
3.64
8.213e-06
2.249e-08
d
yr
n .2707271214415228 1.6721e-09 deg/d
Q 2.93619983720761 1.209e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1061  
   data-arc span      10608 days (29.04 yr)  
   first obs. used      1991-04-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:06:51  

Additional Information
 Earth MOID = .816034 au 
 Jupiter MOID = 2.51492 au 
 T_jup = 3.501 
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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 15.0   n/a MPO417111  
diameter diameter 2.675 km 0.313 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.325   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

42566 Ryutaro           Discovered 1996 Dec. 3 by T. Seki at Geisei.
Ryutaro Hirota (1892-1952), a renowned Japanese composer, was born in Aki city, Kochi prefecture and studied musical composition at Tokyo Music School. He composed many children's songs, which have been enjoyed by many generations of Japanese.
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 2017-01-12Last Updated: 2017-01-17

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2084-Aug-19 18:54 < 00:01 Iris 0.0291572400559773 0.0291443479779411 0.0291701376084216 4.06731972252133 4.06731967404628 2482457.287336132 0.676429826633519 900.171129337897 28.6700826689607 -44.4717564543941 106579.845137493 T 24 CATAB v2.0f-lin.ifort 2020-May-20 09:07:07 2020-May-20 09:07
2119-Nov-17 15:06 00:02 Thisb 0.0391043205126929 0.0390954866606943 0.0391131666144204 5.59038211706428 5.59038208587478 2495329.129179620 2.02612554752796 1181.17802811386 41.3220703036643 -68.1821720420859 131401.53659276 T 24 CATAB v2.0f-lin.ifort 2020-May-20 09:07:07 2020-May-20 09:07
2123-Oct-22 11:03 < 00:01 Hebe 0.0351311767894566 0.0351036941064568 0.0351586603012122 3.78914475430085 3.78914470760012 2496763.960609400 0.869634119529503 1395.81764501059 36.0188841893598 -11.1288084144934 28381.9340808304 T 24 CATAB v2.0f-lin.ifort 2020-May-20 09:07:07 2020-May-20 09:07

Alternate Designations
 1996 XQ25 = 2000 WZ168 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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