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3671 Dionysus (1984 KD)
Classification: Apollo [NEO, PHA]          SPK-ID: 2003671
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 128 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5416006165710953 2.0954e-08  
a 2.198411249164756 1.7408e-09 au
q 1.007750361140293 4.5789e-08 au
i 13.53385396998805 4.7284e-06 deg
node 82.08621147542516 1.4189e-05 deg
peri 204.2648060041688 1.46e-05 deg
M 68.47208889036881 6.2351e-06 deg
tp 2458974.049695111273
(2020-May-04.54969511)
2.0391e-05 TDB
period 1190.588911205374
3.26
1.4141e-06
3.872e-09
d
yr
n .302371369842114 3.5914e-10 deg/d
Q 3.389072137189221 2.6836e-09 au
  Orbit Determination Parameters
   # obs. used (total)      732  
   data-arc span      13377 days (36.62 yr)  
   first obs. used      1984-05-27  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51308  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:24:35  

Additional Information
 Earth MOID = .0192864 au 
 Jupiter MOID = 1.83874 au 
 T_jup = 3.429 
[ 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 16.48   n/a E2021B10  
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. 2020-October); 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.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]
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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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