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1850 Kohoutek (1942 EN)
Classification: Main-belt Asteroid          SPK-ID: 2001850
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258848175790379 2.7103e-08  
a 2.250774754575079 6.5185e-09 au
q 1.967436385183891 6.0702e-08 au
i 4.050979512804386 3.1177e-06 deg
node 68.92080681905703 5.3977e-05 deg
peri 190.7911439274801 5.6452e-05 deg
M 238.4783355453034 1.8131e-05 deg
tp 2459016.839569119740
(2020-Jun-16.33956912)
6.2732e-05 TDB
period 1233.378801678466
3.38
5.358e-06
1.467e-08
d
yr
n .2918811313362021 1.268e-09 deg/d
Q 2.534113123966266 7.339e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2595  
   data-arc span      28174 days (77.14 yr)  
   first obs. used      1942-03-23  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44866  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:28:03  

Additional Information
 Earth MOID = .951993 au 
 Jupiter MOID = 2.5117 au 
 T_jup = 3.613 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO458847  
diameter diameter 7.642 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.68 h n/a LCDB (Rev. 2019-January); 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.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.181   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1850 Kohoutek (1942 EN)          Discovered 1942-Mar-23 by Reinmuth, K. at Heidelberg
Discovery is clearly Mar. 23. By error a provisional designation 1942 EN rather than an F designation was assigned.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 EN = 1949 KD = 1953 SH = 1959 GR = 1965 AQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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