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108 Hecuba
Classification: Outer Main-belt Asteroid          SPK-ID: 2000108
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05537604017673468 3.2819e-08  
a 3.238139864374087 1.6288e-08 AU
q 3.058824501146622 1.0809e-07 AU
i 4.22053417710997 4.5441e-06 deg
node 350.0183429899055 4.3032e-05 deg
peri 204.2033656952845 5.2334e-05 deg
M 65.65349113838612 3.0461e-05 deg
tp 2456612.352176110846
(2013-Nov-15.85217611)
0.00018127 JED
period 2128.344040464843
5.83
1.6059e-05
4.397e-08
d
yr
n .1691455860309943 1.2762e-09 deg/d
Q 3.417455227601553 1.719e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1625  
   data-arc span      49401 days (135.25 yr)  
   first obs. used      1880-01-26  
   last obs. used      2015-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60556  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:27:15  

Additional Information
 Earth MOID = 2.05986 AU 
 T_jup = 3.178 
[ 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 8.09 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
diameter diameter 64.97 km 4.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 14.256 h n/a LCDB (Rev. 2015-May); Warner et al., 2009 Published Reference List:
[Blanco, C.; Di Martino, M.; Lazzarin, M.; Cellino, A.; et al. (1994) Seventy-Five Years of Hirayama Asteroid Families, ASP Conf. Ser. 63, 280-285.]
[Pilcher, F. (2013) Minor Planet Bul. 40, 158-160.]
[Pilcher, F. (2014) Minor Planet Bul. 41, 250-252.]
geometric albedo albedo 0.2431   0.037 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
B-V BV .855 mag .013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=2.51, mean=7.27, max.=10.66) deg.
U-B UB .502 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=2.51, mean=7.27, max.=10.66) 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 Sl   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)

108 Hecuba          Discovered 1869-Apr-02 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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