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3 Juno
Classification: Main-belt Asteroid          SPK-ID: 2000003
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2549658013966137 2.028e-08  
a 2.670000468156835 1.7334e-09 AU
q 1.989241659063894 5.4078e-08 AU
i 12.98205670847419 2.504e-06 deg
node 169.9115489737334 1.1337e-05 deg
peri 248.0857791538812 1.2501e-05 deg
M 346.9285136070818 6.5561e-06 deg
tp 2455258.361262772897
(2010-Mar-02.86126278)
2.9049e-05 JED
period 1593.549040415782
4.36
1.5518e-06
4.249e-09
d
yr
n .2259108385557248 2.1999e-10 deg/d
Q 3.350759277249776 2.1753e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      6505  
   data-arc span      67726 days (185.42 yr)  
   first obs. used      1824-04-18  
   last obs. used      2009-09-21  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   quality code      0  
   fit RMS      .61958  
   data source      ORB  
   producer      Otto Matic  
   solution date      2009-Oct-06 16:18:21  

Additional Information
 Earth MOID = 1.04062 AU 
 T_jup = 3.299 
[ 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 5.33 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
magnitude slope G 0.32   n/a PDS3 (MPC 17257) Fit
diameter diameter 233.92 km 11.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
rotation period rot_per 7.210 h n/a IAU Lightcurve Data
(A.W. Harris, E-mail Mar. 2006)
Published Reference List:
[Groeneveld, I., Kuiper, G.P.: 1954, Astrophys. J. 120, 529-546.]
[Chang, Y.C., Chang, C.-s.: 1962, Acta Astron. Sin. 10, 101-111.]
[Gehrels, T., Owings D.: 1962, Astrophys. J. 135, 906-924.]
[Millis, R.L., Wasserman, L.H., Bowell, E., Franz, O.G., White, N.M., Lockwood, G.W., Nye, R., Bertram, R., Klemola, A., Dunham, E., Baron, R.L., Elliot, J.L., Harris, A., Young, J.W., Faulkner, J., Stanton, R., Reitsema, H.J., Hubbard, W.B., Zellner, B., Lebofsky, L., Cruikshank, D.P., Macknick, L.S., Becklin, E.E., Morrison, D., Lonsdale, C.J., Kunkle, T.D., Lee, T., Gatley, I., A'Hearn, M.F., DuPuy, D.L., Nolthenius, R., Ford, H., McKenna, D., Placova, Z., Horne, K., Sandmann, W.H., Taylor, G.E., Tucker, R.: 1981, Astron. J. 86, 306-313.]
[Schroll, A., Schober, H.J., Lagerkvist, C.-I.: 1981, Astron. Astrophys. 104, 296-299.]
geometric albedo albedo 0.2383   0.025 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV .824 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=19; phase (min.=7.79, mean=16.60, max.=25.79) deg.
U-B UB .433 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=18; phase (min.=7.79, mean=16.62, max.=25.79) 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 Sk   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)

3 Juno           Discovered 1804-Sep-01 by Harding, K. at Lilienthal
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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