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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1681923826704271 4.5088e-08  
a 3.088519372791938 1.3589e-08 AU
q 2.569053940558288 1.4146e-07 AU
i 6.429905023488985 5.2542e-06 deg
node 127.2056004575927 4.1076e-05 deg
peri 184.9085120538804 4.345e-05 deg
M 279.2875509078051 1.7752e-05 deg
tp 2457244.989950366576
(2015-Aug-10.48995037)
9.8781e-05 JED
period 1982.54896155098
5.43
1.3084e-05
3.582e-08
d
yr
n .1815844183330364 1.1984e-09 deg/d
Q 3.607984805025587 1.5874e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1533  
   data-arc span      52396 days (143.45 yr)  
   first obs. used      1871-01-15  
   last obs. used      2014-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61506  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:53:34  

Additional Information
 Earth MOID = 1.55393 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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