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100 Hekate
Classification: Main-belt Asteroid          SPK-ID: 2000100
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684446508233893 4.4619e-08  
a 3.089617453340748 1.2953e-08 au
q 2.569187920234917 1.3978e-07 au
i 6.429569022394261 5.1909e-06 deg
node 127.1991107987592 3.961e-05 deg
peri 184.7355606199902 4.1618e-05 deg
M 64.64299935145475 1.5478e-05 deg
tp 2457244.315931993872
(2015-Aug-09.81593199)
8.4718e-05 JED
period 1983.606357512254
5.43
1.2474e-05
3.415e-08
d
yr
n .1814876215921667 1.1413e-09 deg/d
Q 3.61004698644658 1.5135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1687  
   data-arc span      52936 days (144.93 yr)  
   first obs. used      1871-01-15  
   last obs. used      2015-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59044  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:22:26  

Additional Information
 Earth MOID = 1.55453 au 
 Jupiter MOID = 1.66378 au 
 T_jup = 3.194 
[ 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 7.67 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
diameter diameter 88.66 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
rotation period rot_per 27.066 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Galad, A.; Vilagi, J.; Kornos, L.; Gajdos, S. (2009) Minor Planet Bul. 36, 116-118.]
geometric albedo albedo 0.1922   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV .838 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=2.98, mean=5.97, max.=11.64) deg.
U-B UB .363 mag .049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=2.98, mean=5.97, max.=11.64) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   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)

100 Hekate          Discovered 1868-Jul-11 by Watson, J. C. at Ann Arbor
Independent discovery July 18 by C. Wolf, Paris, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1955 QA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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