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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08858916084213826 4.1668e-08  
a 2.748156879759626 9.8085e-09 au
q 2.504699967919172 1.1343e-07 au
i 5.228557092839393 4.4143e-06 deg
node 188.6530638413616 3.8205e-05 deg
peri 171.2341740443775 4.307e-05 deg
M 240.5999587886352 2.1011e-05 deg
tp 2459552.402910402508
(2021-Dec-03.90291040)
9.8301e-05 TDB
period 1664.028301239746
4.56
8.9086e-06
2.439e-08
d
yr
n .2163424743027448 1.1582e-09 deg/d
Q 2.991613791600081 1.0677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2517  
   data-arc span      24202 days (66.26 yr)  
   first obs. used      1953-10-30  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47701  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:04:08  

Additional Information
 Earth MOID = 1.50146 au 
 Jupiter MOID = 2.42379 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456084.5 (2012-Jun-06.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08526349127698571 4.148e-08  
q 2.514353220740771 1.1225e-07 au
tp 2456224.083450947438
(2012-Oct-23.58345095)
9.6771e-05 TDB
node 188.8515934531527 3.8254e-05 deg
peri 171.3605560495223 4.3536e-05 deg
i 5.223489544182145 4.4108e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2517  
   data-arc span      24202 days (66.26 yr)  
   first obs. used      1953-10-30  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47701  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:04:08  

Additional Information
 Jupiter MOID = 2.42379 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.720605169283785E-15 -4.641294599670024E-15 3.717483781597256E-13 6.332302731877561E-16 4.907315378546481E-14 3.196149432985838E-16
q -4.641294599670024E-15 1.260026761105752E-14 -8.123201725607847E-13 -2.895666028472773E-15 -9.441391644683249E-14 -6.887593050848141E-16
tp 3.717483781597256E-13 -8.123201725607847E-13 9.364582522325452E-9 1.49630928106909E-12 2.021933243342756E-9 -1.217400588847013E-12
node 6.332302731877561E-16 -2.895666028472773E-15 1.49630928106909E-12 1.463356186938377E-9 -1.456454473197488E-9 -6.77285203633657E-12
peri 4.907315378546481E-14 -9.441391644683249E-14 2.021933243342756E-9 -1.456454473197488E-9 1.895370604128599E-9 6.477311856442313E-12
i 3.196149432985838E-16 -6.887593050848141E-16 -1.217400588847013E-12 -6.77285203633657E-12 6.477311856442313E-12 1.945554981486646E-11

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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