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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1492578032055643 7.4827e-08  
a 1.726608351174684 6.3611e-09 AU
q 1.468898581681969 1.2955e-07 AU
i 16.48051329628555 8.9031e-06 deg
node 276.5762095827436 2.562e-05 deg
peri 109.9298412615875 4.3368e-05 deg
M 244.3104722449389 3.0925e-05 deg
tp 2457066.805864307525
(2015-Feb-13.30586431)
7.1198e-05 JED
period 828.6844367943679
2.27
4.5795e-06
1.254e-08
d
yr
n .4344235079309586 2.4007e-09 deg/d
Q 1.984318120667399 7.3106e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      11967 days (32.76 yr)  
   first obs. used      1980-06-06  
   last obs. used      2013-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48596  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-22 17:09:51  

Additional Information
 Earth MOID = .553095 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. 2013-Sep-12) 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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