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15499 Cloyd (1999 FY8)
Classification: Main-belt Asteroid          SPK-ID: 2015499
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09243175415751274 1.5068e-08  
a 3.003421330968367 1.5158e-08 au
q 2.725809828872869 4.7965e-08 au
i 10.69414048395962 8.3866e-07 deg
node 152.7653973060456 6.8393e-06 deg
peri 283.4299114918032 1.679e-05 deg
M 151.6566258944662 1.7242e-05 deg
tp 2458399.593705520289
(2018-Oct-08.09370552)
8.8566e-05 TDB
period 1901.178166876365
5.21
1.4393e-05
3.941e-08
d
yr
n .1893562666940784 1.4335e-09 deg/d
Q 3.281032833063865 1.6559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1962  
   data-arc span      14822 days (40.58 yr)  
   first obs. used      1980-08-03  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:00:07  

Additional Information
 Earth MOID = 1.76581 au 
 Jupiter MOID = 1.95225 au 
 T_jup = 3.219 
[ 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 12.97   n/a E2021B10  
diameter diameter 9.037 km 0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.878 h n/a LCDB (Rev. 2020-October); 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:
[Odden, C.; French, J.; Briggs, J. (2013) Minor Planet Bull. 40, 110-111.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.260   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15499 Cloyd           Discovered 1999 Mar. 19 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Marshall P. Cloyd (b. 1939), a businessman and philanthropist, has provided assistance to organizations in the U.S. and U.K. to preserve historical items and artifacts, and he has encouraged public exhibitions for naval, aeronautic and space programs. The name was suggested by E. K. Gibson and F. Vilas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

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Alternate Designations
 1999 FY8 = 1980 PN3 
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