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3671 Dionysus (1984 KD)
Classification: Apollo [NEO, PHA]          SPK-ID: 2003671
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5414710191783562 2.6827e-08  
a 2.198891253181047 1.8355e-09 au
q 1.008255365258733 5.8668e-08 au
i 13.53468000454162 5.3768e-06 deg
node 82.13198865676999 1.7194e-05 deg
peri 204.2173594242236 1.8468e-05 deg
M 244.4080753067619 5.793e-06 deg
tp 2457782.909831196395
(2017-Jan-29.40983120)
1.9563e-05 JED
period 1190.978864622673
3.26
1.4912e-06
4.083e-09
d
yr
n .3022723666167288 3.7847e-10 deg/d
Q 3.389527141103362 2.8293e-09 au
  Orbit Determination Parameters
   # obs. used (total)      471  
   data-arc span      11570 days (31.68 yr)  
   first obs. used      1984-05-27  
   last obs. used      2016-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5893  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-31 06:17:40  

Additional Information
 Earth MOID = .0199599 au 
 Jupiter MOID = 1.82836 au 
 T_jup = 3.429 
[ 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 16.4 mag n/a MPO263379  
diameter diameter 1.5 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 2.7053 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Mottola, S.; Hahn, G.; Pravec, P.; Sarounova, L. (1997) IAUC 6680; http://www.eso.org/outreach/press-rel/pr-1997 /pr-08-97.html.]
[Pravec, P.; et al. (2006) Icarus 181, 63-93.]
geometric albedo albedo 0.16   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B Cb   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)

3671 Dionysus (1984 KD)          Discovered 1984-May-27 by Shoemaker, C. and Shoemaker, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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