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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1493323813332599 3.916e-08  
a 1.726337408854723 3.8775e-09 au
q 1.468539332605758 6.6539e-08 au
i 16.48220834345569 4.4656e-06 deg
node 276.530381121963 1.2445e-05 deg
peri 110.0570365028268 1.9397e-05 deg
M 206.898333359376 1.4799e-05 deg
tp 2459552.841960780236
(2021-Dec-04.34196078)
3.4386e-05 TDB
period 828.4893865892656
2.27
2.7913e-06
7.642e-09
d
yr
n .4345257837062368 1.464e-09 deg/d
Q 1.984135485103689 4.4565e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1548  
   data-arc span      14590 days (39.95 yr)  
   first obs. used      1980-06-06  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40232  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:53:32  

Additional Information
 Earth MOID = .552904 au 
 Jupiter MOID = 3.43317 au 
 T_jup = 4.106 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.47   n/a E2020-QM5  
rotation period rot_per 24. h n/a LCDB (Rev. 2020-October); 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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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