Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
6 Hebe
Classification: Main-belt Asteroid          SPK-ID: 2000006
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2030071093939073 1.9821e-08  
a 2.425159989654524 2.7929e-09 au
q 1.932835270337001 4.8235e-08 au
i 14.73790110045524 2.2005e-06 deg
node 138.6402027591858 1.1266e-05 deg
peri 239.8074902310437 1.307e-05 deg
M 86.19792300103161 7.3391e-06 deg
tp 2458270.203996126852
(2018-May-31.70399613)
2.7929e-05 TDB
period 1379.459704532673
3.78
2.383e-06
6.524e-09
d
yr
n .2609717404699105 4.5082e-10 deg/d
Q 2.917484708972046 3.3599e-09 au
  Orbit Determination Parameters
   # obs. used (total)      6034  
   data-arc span      62329 days (170.65 yr)  
   first obs. used      1848-09-05  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40627  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 17:53:24  

Additional Information
 Earth MOID = .973965 au 
 Jupiter MOID = 2.6358 au 
 T_jup = 3.439 
[ 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 5.71   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 LCDB (Rev. 2019-January); Warner et al., 2009 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.]
[Gil Hutton, R.; Blain, A. (1988) Minor Planet Bull. 15, 3-4.]
[Michalowski, T. (1988) Acta Astronomica 38, 455-468.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. 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.]
[Marset, M.; Carry, B.; Dumas, C.; Hanus, J.; et al. (2017) Astron. Astrophys. 604, A64.]
geometric albedo albedo 0.2679   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV 0.822   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=27; phase (min.=1.33, mean=14.50, max.=28.87) deg.
U-B UB 0.399   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin