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11718 Hayward (1998 HD95)
Classification: Main-belt Asteroid          SPK-ID: 2011718
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .193640957265125 5.4359e-08  
a 2.747694496433429 1.3973e-08 au
q 2.215628303871944 1.465e-07 au
i 4.816726764130173 3.8e-06 deg
node 76.2699989878047 5.6612e-05 deg
peri 293.3951782882906 5.7519e-05 deg
M 208.4111027558054 1.4715e-05 deg
tp 2459901.012655238982
(2022-Nov-17.51265524)
7.1058e-05 TDB
period 1663.608354375647
4.55
1.269e-05
3.474e-08
d
yr
n .2163970859205671 1.6507e-09 deg/d
Q 3.279760688994914 1.6679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1384  
   data-arc span      12226 days (33.47 yr)  
   first obs. used      1986-11-30  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50028  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:44  

Additional Information
 Earth MOID = 1.21927 au 
 Jupiter MOID = 2.19605 au 
 T_jup = 3.315 
[ 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 14.2   n/a MPO502259  
diameter diameter 4.129 km 0.481 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.063 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.285   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11718 Hayward           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Nicholas Mark Edward Alexander Hayward (b. 1984) is a finalist in the 2002 Intel International Science and Engineering Fair for his chemistry project. He attends the Dover Grammar School for Boys, Dover, Kent, U.K.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 HD95 = 1986 WG2 = 1993 FB16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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