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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1492578717516415 6.5098e-08  
a 1.726608356180432 7.0076e-09 AU
q 1.468898467588341 1.1454e-07 AU
i 16.48050834314149 8.1661e-06 deg
node 276.5762038102285 2.2163e-05 deg
peri 109.9298221162413 3.5024e-05 deg
M 244.3104866613139 2.57e-05 deg
tp 2457066.805832280557
(2015-Feb-13.30583228)
5.9381e-05 JED
period 828.6844403981257
2.27
5.0449e-06
1.381e-08
d
yr
n .4344235060417507 2.6447e-09 deg/d
Q 1.984318244772524 8.0536e-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 = .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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