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1766 Slipher (1962 RF)
Classification: Main-belt Asteroid          SPK-ID: 2001766
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08847877476122767 4.2405e-08  
a 2.748133005632015 1.0218e-08 au
q 2.504981564412804 1.1511e-07 au
i 5.228528338569135 4.4537e-06 deg
node 188.6561447393256 3.9166e-05 deg
peri 171.4097985202021 4.4101e-05 deg
M 153.8485374815048 2.112e-05 deg
tp 2457889.375043221673
(2017-May-15.87504322)
9.635e-05 TDB
period 1664.006617358802
4.56
9.2809e-06
2.541e-08
d
yr
n .216345293488923 1.2066e-09 deg/d
Q 2.991284446851226 1.1122e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2400  
   data-arc span      23933 days (65.52 yr)  
   first obs. used      1953-10-30  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46771  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:26:57  

Additional Information
 Earth MOID = 1.5009 au 
 Jupiter MOID = 2.42401 au 
 T_jup = 3.335 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO250214  
diameter diameter 19.099 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.677 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.058   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1766 Slipher (1962 RF)          Discovered 1962-Sep-07 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1962 RF = 1953 UR = 1980 RH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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