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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1114327966778659 3.4206e-08  
a 2.717922891967224 1.0724e-08 au
q 2.415057142960523 9.2777e-08 au
i 2.963046964430402 3.7453e-06 deg
node 85.03325264213323 8.3894e-05 deg
peri .1552476390660237 8.643e-05 deg
M 178.9021036599908 2.0056e-05 deg
tp 2458187.169477408143
(2018-Mar-09.66947741)
9.06e-05 TDB
period 1636.643628794563
4.48
9.6869e-06
2.652e-08
d
yr
n .2199623630131079 1.3019e-09 deg/d
Q 3.020788640973925 1.192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2319  
   data-arc span      17369 days (47.55 yr)  
   first obs. used      1972-10-06  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45741  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:34:28  

Additional Information
 Earth MOID = 1.43125 au 
 Jupiter MOID = 2.16519 au 
 T_jup = 3.349 
[ 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 12.8   n/a MPO384767  
diameter diameter 9.754 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.56 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.154   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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