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5 Astraea
Classification: Main-belt Asteroid          SPK-ID: 2000005
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1911354854739394 2.226e-08  
a 2.573809011032416 4.0043e-09 AU
q 2.081862776191536 5.6898e-08 AU
i 5.368522486650281 2.6873e-06 deg
node 141.5955627492366 2.9072e-05 deg
peri 358.9289805719355 2.9904e-05 deg
M 260.1895419344659 7.4019e-06 deg
tp 2457418.654187594782
(2016-Jan-31.15418760)
3.1147e-05 JED
period 1508.213772902256
4.13
3.5197e-06
9.636e-09
d
yr
n .2386929535242553 5.5704e-10 deg/d
Q 3.065755245873297 4.7697e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2185  
   data-arc span      61652 days (168.79 yr)  
   first obs. used      1845-12-15  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5773  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:44:12  

Additional Information
 Earth MOID = 1.09535 AU 
 T_jup = 3.396 
[ 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 6.85 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
diameter diameter 119.07 km 6.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 16.800 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Taylor, R.C. (1978) Astron. J. 83, 201-204.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planetary and Space Sci. 49, 657-671.]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planetary and Space Science 53, 1147-1165.]
[Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bul. 35, 63-66.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.2268   0.027 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV .826 mag .013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg.
U-B UB .411 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) 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)

5 Astraea          Discovered 1845-Dec-08 by Hencke, K. L. at Driesen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1969 SE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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