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4205 David Hughes (1985 YP)
Classification: Mars-crossing Asteroid          SPK-ID: 2004205
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1492068772479245 6.5098e-08  
a 1.726587158163816 7.0199e-09 AU
q 1.468968479997825 1.1453e-07 AU
i 16.48004709287283 8.1659e-06 deg
node 276.5750195155079 2.2164e-05 deg
peri 109.9280871835733 3.5034e-05 deg
M 331.1930611334647 2.5782e-05 deg
tp 2457066.809506650073
(2015-Feb-13.30950665)
5.9405e-05 JED
period 828.6691794856928
2.27
5.0538e-06
1.384e-08
d
yr
n .4344315064588637 2.6495e-09 deg/d
Q 1.984205836329807 8.0674e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      657  
   data-arc span      12439 days (34.06 yr)  
   first obs. used      1980-06-06  
   last obs. used      2014-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43961  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:08:32  

Additional Information
 Earth MOID = .553736 AU 
 T_jup = 4.106 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO259367  
rotation period rot_per 24. h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
SMASSII spectral type spec_B Xe   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)

4205 David Hughes (1985 YP)          Discovered 1985-Dec-18 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1985 YP = 1986 AF = 1986 CF 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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