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JPL Small-Body Database Browser
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27955 Yasumasa (1997 QU4)
Classification: Main-belt Asteroid          SPK-ID: 2027955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2093160030007284 5.562e-08  
a 2.40004924599163 1.0603e-08 au
q 1.89768053081575 1.3235e-07 au
i 6.873950574974805 5.3643e-06 deg
node 329.3168752974416 4.2264e-05 deg
peri 52.55289802495835 4.3753e-05 deg
M 266.4049772119046 1.1989e-05 deg
tp 2458953.584708927701
(2020-Apr-14.08470893)
4.6501e-05 TDB
period 1358.09032817651
3.72
8.9997e-06
2.464e-08
d
yr
n .2650780971861918 1.7566e-09 deg/d
Q 2.90241796116751 1.2822e-08 au
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      21044 days (57.62 yr)  
   first obs. used      1960-09-25  
   last obs. used      2018-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55872  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 18:36:58  

Additional Information
 Earth MOID = .908278 au 
 Jupiter MOID = 2.59642 au 
 T_jup = 3.487 
[ show covariance matrix ]

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 14.8   n/a MPO296355  
diameter diameter 4.461 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.117   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27955 Yasumasa           Discovered 1997 Aug. 24 by T. Okuni at Nanyo.
Yasumasa Watanabe (b. 1946) became a member of the Yamagata Astronomical Society in 1986 and actively popularizes astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 1997 QU4 = 1986 RA14 = 3080 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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