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4 Vesta
Classification: Main-belt Asteroid          SPK-ID: 2000004
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08874017002173754 1.0284e-08  
a 2.361793227026224 1.2194e-09 AU
q 2.152207294503728 2.388e-08 AU
i 7.140427316529066 1.4093e-06 deg
node 103.8513672233257 2.7662e-06 deg
peri 151.1985275178533 7.5857e-06 deg
M 20.86384148999364 5.5256e-06 deg
tp 2456923.666076666135
(2014-Sep-23.16607667)
2.038e-05 JED
period 1325.748779938602
3.63
1.0267e-06
2.811e-09
d
yr
n .2715446587223504 2.103e-10 deg/d
Q 2.571379159548719 1.3276e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      7107  
   data-arc span      67680 days (185.30 yr)  
   first obs. used      1827-12-11  
   last obs. used      2013-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55596  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2013-Jul-16 08:46:23  

Additional Information
 Earth MOID = 1.14151 AU 
 T_jup = 3.535 
[ 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 3.20 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
magnitude slope G 0.32   n/a PDS3 (MPC 17257) Fit
diameter diameter 530 km n/a Thomas et al. (1997) Yeomans E-mail 2001-Apr-04
GM GM 17.8 km^3/s^2 n/a JPL IOM 312.F01-006  
rotation period rot_per 5.342 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Giclas, H.L. (1951) Lowell Obs. Rep. No. 9, 33-71.]
[Stephenson, C.B. (1951) Astrophys. J. 114, 500-504.]
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.]
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Gehrels, T. (1967) Astron. J. 72, 929-938.]
[Taylor, R.C.; Tapia, S.; Tedesco, E.F. (1985) Icarus 62, 298-304.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Aksenov, A.N.; Egorov, Yu.A.; Teifel, V.G.; Kharitonova, G.A. (1987) Pis'ma Astron. Zh. 13, 616-620; Sov. Astron. Lett. 13, 257-259.]
[Lagerkvist, C.-I.; Williams, I.P. (1987) Astron. Astrophys. Suppl. Ser. 68, 295-315.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Reynoldson, G.; Thacker, P.; Erikson, A.; Oja, T. (1993) Minor Planet Bul. 20, 11-13.]
[Fornasier, S.; Mottola, S.; Barucci, M.A.; Sierks, H.; Hviid, S. (2011) Astron. Astrophys. 533, L9.]
[Russell, C. T.; Raymond, C. A.; Coradini, A.; McSween, H. Y.; et al. (2012) Science 336, 684-686.]
geometric albedo albedo 0.4228   0.053 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
B-V BV .782 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=23; phase (min.=1.73, mean=14.92, max.=24.69) deg.
U-B UB .492 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=23; phase (min.=1.73, mean=15.34, max.=24.69) deg.
Tholen spectral type spec_T V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B V   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)

4 Vesta          Discovered 1807-Mar-29 by Olbers, H. W. at Bremen
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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