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JPL Small-Body Database Browser
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179 Klytaemnestra
Classification: Main-belt Asteroid          SPK-ID: 2000179
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1114579661596882 4.0697e-08  
a 2.976110846851071 1.3192e-08 au
q 2.644399584795263 1.2234e-07 au
i 7.820760478961434 4.8358e-06 deg
node 251.882940987662 3.3801e-05 deg
peri 103.3073985746494 4.0512e-05 deg
M 271.6232141063253 2.3446e-05 deg
tp 2459060.870814185641
0.00012325 TDB
period 1875.305731374109
n .1919686982112586 1.2764e-09 deg/d
Q 3.307822108906878 1.4663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2470  
   data-arc span      44090 days (120.71 yr)  
   first obs. used      1899-02-12  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49829  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:50:31  

Additional Information
 Earth MOID = 1.65329 au 
 Jupiter MOID = 2.16504 au 
 T_jup = 3.238 
[ 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 8.1   n/a MPO492750 IRAS observations used: 33
diameter diameter 69.946 km 0.518 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.173 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.198   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.832   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.33, mean=5.25, max.=6.16) deg.
U-B UB 0.408   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.33, mean=5.25, max.=6.16) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sk   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)

179 Klytaemnestra          Discovered 1877-Nov-11 by Watson, J. C. at Ann Arbor
Initial announcement gave Nov. 12.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Jan-17 14:18 UT
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