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2073 Janacek (1974 DK)
Classification: Main-belt Asteroid          SPK-ID: 2002073
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1131159273824944 5.457e-08  
a 2.715410697719497 1.8249e-08 au
q 2.40825449842261 1.4578e-07 au
i 2.963902314593799 5.3997e-06 deg
node 85.03797267137055 0.00011732 deg
peri .1158946921852806 0.00012055 deg
M 186.6256207352849 2.8243e-05 deg
tp 2458187.607647896073
(2018-Mar-10.10764790)
0.00012966 JED
period 1634.375012296036
4.47
1.6476e-05
4.511e-08
d
yr
n .2202676847673151 2.2205e-09 deg/d
Q 3.022566897016384 2.0313e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1406  
   data-arc span      15652 days (42.85 yr)  
   first obs. used      1972-10-06  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47608  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:03:52  

Additional Information
 Earth MOID = 1.4239 au 
 Jupiter MOID = 2.17265 au 
 T_jup = 3.350 
[ 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 12.7 mag n/a MPO296147  
rotation period rot_per 3.555 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
SMASSII spectral type spec_B X   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)

2073 Janacek (1974 DK)          Discovered 1974-Feb-19 by Kohoutek, L. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 DK = 1972 TQ1 = 1972 TU6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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