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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494030016311682 6.4135e-08  
a 1.726426051107401 6.8835e-09 au
q 1.46849281697771 1.1288e-07 au
i 16.47843812541795 7.772e-06 deg
node 276.5503921616699 2.1707e-05 deg
peri 110.0188751349536 3.3376e-05 deg
M 231.784702075481 2.5055e-05 deg
tp 2457895.592208716812
(2017-May-22.09220872)
5.8137e-05 JED
period 828.5531980793158
2.27
4.9553e-06
1.357e-08
d
yr
n .4344923184588781 2.5986e-09 deg/d
Q 1.984359285237091 7.9119e-09 au
  Orbit Determination Parameters
   # obs. used (total)      685  
   data-arc span      13096 days (35.85 yr)  
   first obs. used      1980-06-06  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45909  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:47:18  

Additional Information
 Earth MOID = .552066 au 
 Jupiter MOID = 3.43837 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 LCDB (Rev. 2016-February); Warner et al., 2009 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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