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JPL Small-Body Database Browser
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5 Astraea
Classification: Main-belt Asteroid          SPK-ID: 2000005
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .19091334597927 2.3771e-08  
a 2.574037282634431 4.1162e-09 au
q 2.082619212331304 6.0973e-08 au
i 5.367427037808923 2.7436e-06 deg
node 141.5710239145361 2.926e-05 deg
peri 358.6484233069346 3.0169e-05 deg
M 17.84633707650325 8.7036e-06 deg
tp 2458925.723132656136
(2020-Mar-17.22313266)
3.6407e-05 TDB
period 1508.41442299293
4.13
3.6182e-06
9.906e-09
d
yr
n .2386612024603317 5.7247e-10 deg/d
Q 3.065455352937558 4.902e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2947  
   data-arc span      63573 days (174.05 yr)  
   first obs. used      1845-12-15  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:11:45  

Additional Information
 Earth MOID = 1.09575 au 
 Jupiter MOID = 1.95968 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451992.5 (2001-Mar-24.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926013224679207 2.4065e-08  
q 2.078083644455423 6.1885e-08 au
tp 2451379.019003623581
(1999-Jul-19.51900362)
3.3056e-05 TDB
node 141.6913161633553 2.921e-05 deg
peri 357.6748712981209 3.0076e-05 deg
i 5.368397557643806 2.7474e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2947  
   data-arc span      63573 days (174.05 yr)  
   first obs. used      1845-12-15  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:11:45  

Additional Information
 Jupiter MOID = 1.95968 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.791296080850831E-16 -1.487318230305762E-15 -8.197574540770893E-15 -2.625586236246458E-16 5.420555996111043E-15 1.076770027338668E-17
q -1.487318230305762E-15 3.829726779994255E-15 1.46160366401316E-14 7.876958214047783E-16 -1.474244614139241E-14 -2.03614991769688E-17
tp -8.197574540770893E-15 1.46160366401316E-14 1.092722864141223E-9 7.066359839909678E-13 2.450750772339214E-10 2.655065013522445E-13
node -2.625586236246458E-16 7.876958214047783E-16 7.066359839909678E-13 8.532064799860977E-10 -8.492196890881781E-10 6.563465961887739E-12
peri 5.420555996111043E-15 -1.474244614139241E-14 2.450750772339214E-10 -8.492196890881781E-10 9.045491442007412E-10 -6.47615368040878E-12
i 1.076770027338668E-17 -2.03614991769688E-17 2.655065013522445E-13 6.563465961887739E-12 -6.47615368040878E-12 7.548154224655023E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.9   n/a MPO502153 IRAS observations used: 9
diameter diameter 106.699 km 3.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.806 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 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) Planet. 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) Planet. Space Sci. 53, 1147-1165.]
[Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bull. 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.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.274   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.826   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg.
U-B UB 0.411   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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