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JPL Small-Body Database Browser
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2156 Kate (A917 SH)
Classification: Main-belt Asteroid          SPK-ID: 2002156
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2018298393628039 3.8372e-08  
a 2.242209548157382 6.6386e-09 au
q 1.789664755235033 8.5188e-08 au
i 5.347082079563478 4.1043e-06 deg
node 17.1683546504463 4.4487e-05 deg
peri 4.7003670404078 4.5749e-05 deg
M 80.38512489998816 1.2264e-05 deg
tp 2458326.666918636592
(2018-Jul-27.16691864)
4.1169e-05 TDB
period 1226.345165395662
3.36
5.4463e-06
1.491e-08
d
yr
n .2935551997580153 1.3037e-09 deg/d
Q 2.694754341079732 7.9784e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2004  
   data-arc span      37121 days (101.63 yr)  
   first obs. used      1917-09-23  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47294  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:30:57  

Additional Information
 Earth MOID = .791901 au 
 Jupiter MOID = 2.76291 au 
 T_jup = 3.601 
[ 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 12.69   n/a PDS3 (MPC 17264)  
diameter diameter 8.131 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.6228 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
[Dunckel, P.B. (2011) Posting on CALL site. http://www.minorplanet.info/call.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.189   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.916   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=16.85 deg.
U-B UB 0.525   0.057 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=16.85 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

2156 Kate           Discovered 1917 Sept. 23 by S. Belyavskij at Simeis.
Named by L. K. Kristensen, who found several of the identifications involving this planet, in honor of his wife.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5284Last Updated: 2007-10-23

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Alternate Designations
 A917 SH = 1937 PK = 1954 UT2 = 1956 GP = 1957 QK = 1969 BE = 1970 LK = 1974 RL1 = 1976 GK1 = 1979 BC 
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