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8270 Winslow (1989 JF)
Classification: Main-belt Asteroid          SPK-ID: 2008270
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .170176949692391 3.6007e-08  
a 2.181971894520804 6.9668e-09 au
q 1.810650573196726 7.8432e-08 au
i 4.431491547916616 3.565e-06 deg
node .370966795065832 5.2905e-05 deg
peri 281.8807731175174 5.3981e-05 deg
M 191.2684142805744 1.0595e-05 deg
tp 2459552.280111294727
3.5136e-05 TDB
period 1177.259368595104
n .3057949756896903 1.4646e-09 deg/d
Q 2.553293215844882 8.1524e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1854  
   data-arc span      11320 days (30.99 yr)  
   first obs. used      1989-05-02  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46972  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:55:44  

Additional Information
 Earth MOID = .800783 au 
 Jupiter MOID = 2.59712 au 
 T_jup = 3.657 
[ 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 14.2   n/a MPO448996  
diameter diameter 3.879 km 0.382 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 6.37 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site,]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.269   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8270 Winslow           Discovered 1989 May 2 by E. F. Helin at Palomar.
Named in honor of John Seymour Winslow, a friend of the discoverer's husband, Ron, since grade school. John graduated from Caltech with a degree in physics and later returned for a master's degree in electrical engineering. He developed the equipment used to master the MCA video disc, and later became a partner in Optical Disc Corporation, a firm that provides mastering equipment for compact discs. This minor planet was presented on the occasion of the 45th reunion of John and Ron's Caltech Class of '53.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
1943-May-01 06:16 00:02 Amphi 0.0434806542095879 0.0434783296220757 0.0434829795534892 3.45225654071252 3.45225650241471 2430845.760861151 2.21628313574001 324.10881677014 38.2322934148441 -70.142661222439 160051.618942163 T 34 CATAB v2.0f-lin.ifort 2020-May-20 02:55:55 2020-May-20 02:55

Alternate Designations
 1989 JF = 1992 FM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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