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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 123 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5416798964778041 2.1211e-08  
a 2.198591327754923 1.8234e-09 au
q 1.007658604939639 4.637e-08 au
i 13.53409449469314 4.752e-06 deg
node 82.08578905609093 1.4461e-05 deg
peri 204.2630364432902 1.4849e-05 deg
M 7.994518618488106 6.1765e-06 deg
tp 2458974.057347952652
(2020-May-04.55734795)
2.0401e-05 TDB
period 1190.735201370476
3.26
1.4813e-06
4.056e-09
d
yr
n .3023342214000712 3.7611e-10 deg/d
Q 3.389524050570208 2.8111e-09 au
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      13326 days (36.48 yr)  
   first obs. used      1984-05-27  
   last obs. used      2020-11-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5172  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-21 05:21:26  

Additional Information
 Earth MOID = .0206816 au 
 Jupiter MOID = 1.83881 au 
 T_jup = 3.429 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457403.5 (2016-Jan-16.0) TDB
Reference: JPL 123 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5414658809594245 2.1219e-08  
q 1.008271214369624 4.6402e-08 au
tp 2457782.911274261685
(2017-Jan-29.41127426)
1.916e-05 TDB
node 82.13151060839688 1.4459e-05 deg
peri 204.2174177634366 1.4845e-05 deg
i 13.53457710592217 4.7515e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      13326 days (36.48 yr)  
   first obs. used      1984-05-27  
   last obs. used      2020-11-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5172  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-21 05:21:26  

Additional Information
 Jupiter MOID = 1.83881 au 
 T_jup = 3.429 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.502641048504617E-16 -9.844784182256825E-16 6.360342722755178E-14 6.021024280975881E-14 -4.85176430688825E-14 -4.943554034432319E-15
q -9.844784182256825E-16 2.153133700924715E-15 -1.262965615441514E-13 -1.271477055661405E-13 1.047170129692141E-13 9.875495494131176E-15
tp 6.360342722755178E-14 -1.262965615441514E-13 3.670986306044619E-10 3.753276002796015E-11 5.71509678032017E-11 -2.394422857457968E-12
node 6.021024280975881E-14 -1.271477055661405E-13 3.753276002796015E-11 2.090666937936495E-10 -1.970337511143463E-10 -2.113642077382522E-11
peri -4.85176430688825E-14 1.047170129692141E-13 5.71509678032017E-11 -1.970337511143463E-10 2.203668531882076E-10 2.04168908346078E-11
i -4.943554034432319E-15 9.875495494131176E-15 -2.394422857457968E-12 -2.113642077382522E-11 2.04168908346078E-11 2.257720503400758E-11

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 16.4   n/a MPO435733  
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. 2019-August); 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. 46-4, in press.]
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

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