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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08858915753898043 3.5146e-08  
a 2.748156879205487 8.9424e-09 au
q 2.504699976491719 9.758e-08 au
i 5.228559573963619 4.0048e-06 deg
node 188.6530406072802 3.4492e-05 deg
peri 171.2341973704337 3.9672e-05 deg
M 240.5999589777619 2.0969e-05 deg
tp 2459552.402909361379
(2021-Dec-03.90290936)
9.8174e-05 TDB
period 1664.028300736444
4.56
8.122e-06
2.224e-08
d
yr
n .2163424743681799 1.056e-09 deg/d
Q 2.991613781919255 9.7346e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2848  
   data-arc span      24336 days (66.63 yr)  
   first obs. used      1953-10-30  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:36:25  

Additional Information
 Earth MOID = 1.50146 au 
 Jupiter MOID = 2.42379 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 12.3   n/a MPO473788  
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-August); 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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