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6 Hebe
Classification: Main-belt Asteroid          SPK-ID: 2000006
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2015442774339414 1.9014e-08  
a 2.425623581579452 1.8646e-09 AU
q 1.936753029503292 4.5972e-08 AU
i 14.7480273715582 2.1043e-06 deg
node 138.7033385619727 1.0768e-05 deg
peri 239.3939093155834 1.2497e-05 deg
M 337.0391371786558 6.895e-06 deg
tp 2456888.507409801786
(2014-Aug-19.00740980)
2.6459e-05 JED
period 1379.855268295543
3.78
1.5911e-06
4.356e-09
d
yr
n .2608969275775478 3.0083e-10 deg/d
Q 2.914494133655611 2.2404e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      5455  
   data-arc span      60166 days (164.73 yr)  
   first obs. used      1848-09-08  
   last obs. used      2013-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53367  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2013-Jul-16 08:46:52  

Additional Information
 Earth MOID = .976749 AU 
 T_jup = 3.439 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.71 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
magnitude slope G 0.24   n/a PDS3 (MPC 17257) Fit
diameter diameter 185.18 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 7.2745 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Ahmad, I.I. (1954) Astrophys. J. 120, 551-560.]
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Gehrels, T.; Taylor, R.C. (1977) Astron. J. 82, 229-237.]
[Di Martino, M.; Cacciatori, S. (1984) Icarus 60, 75-82.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Michalowski, T. (1988) Acta Astronomica 38, 455-468.]
[Gil Hutton, R.; Blain, A. (1988) Minor Planet Bul. 15, 3-4.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planetary and Space Sci. 49, 657-671.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.2679   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV .822 mag .015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=27; phase (min.=1.33, mean=14.50, max.=28.87) deg.
U-B UB .399 mag .019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=24; phase (min.=1.33, mean=14.33, max.=28.87) 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 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)

6 Hebe          Discovered 1847-Jul-01 by Hencke, K. L. at Driesen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1947 JB 
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